{"id":"https://openalex.org/A5064770201","orcid":"https://orcid.org/0000-0001-9680-0499","observed_orcids":["https://orcid.org/0000-0001-9680-0499"],"display_name":"Heinz-Gerd Holl","raw_author_names":["H Holl","H. G. Holl","H. G.\u00a0Holl","H. Holl","H.-G. Holl","H.G. Holl","Heinz-Gerd Holl","Heinz-gerd Holl","Holl, Heinz-Gerd"],"full_name":"Heinz-Gerd Holl","works_count":69,"cited_by_count":436,"summary_stats":{"2yr_mean_citedness":1.0,"h_index":11,"i10_index":14},"ids":{"openalex":"https://openalex.org/A5064770201","orcid":"https://orcid.org/0000-0001-9680-0499","observed_orcids":["https://orcid.org/0000-0001-9680-0499"]},"affiliations":[{"institution":{"id":"https://openalex.org/I165143802","ror":"https://ror.org/00rqy9422","display_name":"The University of Queensland","country_code":"AU","type":"education","lineage":["https://openalex.org/I165143802"]},"years":[2025,2024,2022,2021,2019,2018,2016]},{"institution":{"id":"https://openalex.org/I4210152878","ror":"https://ror.org/04z8jg394","display_name":"GFZ Helmholtz Centre for Geosciences","country_code":"DE","type":"facility","lineage":["https://openalex.org/I1305996414","https://openalex.org/I4210152878"]},"years":[2008,2004]}],"last_known_institutions":null,"topics":[{"id":"https://openalex.org/T11225","display_name":"Geothermal Energy Systems and Applications","count":38,"subfield":{"id":"https://openalex.org/subfields/2105","display_name":"Renewable Energy, Sustainability and the Environment"},"field":{"id":"https://openalex.org/fields/21","display_name":"Energy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10635","display_name":"Hydraulic Fracturing and Reservoir Analysis","count":33,"subfield":{"id":"https://openalex.org/subfields/2210","display_name":"Mechanical Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10892","display_name":"Drilling and Well Engineering","count":21,"subfield":{"id":"https://openalex.org/subfields/2212","display_name":"Ocean Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11302","display_name":"CO2 Sequestration and Geologic Interactions","count":18,"subfield":{"id":"https://openalex.org/subfields/2305","display_name":"Environmental Engineering"},"field":{"id":"https://openalex.org/fields/23","display_name":"Environmental Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10399","display_name":"Hydrocarbon exploration and reservoir analysis","count":14,"subfield":{"id":"https://openalex.org/subfields/2211","display_name":"Mechanics of Materials"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"topic_share":[{"id":"https://openalex.org/T11225","display_name":"Geothermal Energy Systems and Applications","value":0.0003874,"subfield":{"id":"https://openalex.org/subfields/2105","display_name":"Renewable Energy, Sustainability and the Environment"},"field":{"id":"https://openalex.org/fields/21","display_name":"Energy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10635","display_name":"Hydraulic Fracturing and Reservoir Analysis","value":0.0002211,"subfield":{"id":"https://openalex.org/subfields/2210","display_name":"Mechanical Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11302","display_name":"CO2 Sequestration and Geologic Interactions","value":0.0001445,"subfield":{"id":"https://openalex.org/subfields/2305","display_name":"Environmental Engineering"},"field":{"id":"https://openalex.org/fields/23","display_name":"Environmental Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10892","display_name":"Drilling and Well Engineering","value":0.0001131,"subfield":{"id":"https://openalex.org/subfields/2212","display_name":"Ocean Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T13596","display_name":"Grouting, Rheology, and Soil Mechanics","value":0.0001093,"subfield":{"id":"https://openalex.org/subfields/2205","display_name":"Civil and Structural Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"x_concepts":[{"id":"127313418","wikidata":"https://www.wikidata.org/wiki/Q1069","display_name":"Geology","score":0.9359879493713379},{"id":"111766609","wikidata":"https://www.wikidata.org/wiki/Q636340","display_name":"Geothermal gradient","score":0.8520758152008057},{"id":"78762247","wikidata":"https://www.wikidata.org/wiki/Q1273174","display_name":"Petroleum engineering","score":0.7336000204086304},{"id":"187320778","wikidata":"https://www.wikidata.org/wiki/Q1349130","display_name":"Geotechnical engineering","score":0.5716372132301331},{"id":"127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","score":0.4352000057697296}],"counts_by_year":[{"year":2002,"works_count":4,"oa_works_count":0,"cited_by_count":0},{"year":2003,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":2004,"works_count":10,"oa_works_count":1,"cited_by_count":0},{"year":2005,"works_count":4,"oa_works_count":0,"cited_by_count":0},{"year":2006,"works_count":10,"oa_works_count":1,"cited_by_count":0},{"year":2007,"works_count":4,"oa_works_count":0,"cited_by_count":0},{"year":2008,"works_count":3,"oa_works_count":1,"cited_by_count":0},{"year":2011,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2012,"works_count":0,"oa_works_count":0,"cited_by_count":7},{"year":2013,"works_count":7,"oa_works_count":1,"cited_by_count":16},{"year":2014,"works_count":1,"oa_works_count":0,"cited_by_count":20},{"year":2015,"works_count":3,"oa_works_count":0,"cited_by_count":35},{"year":2016,"works_count":2,"oa_works_count":0,"cited_by_count":25},{"year":2017,"works_count":2,"oa_works_count":0,"cited_by_count":13},{"year":2018,"works_count":1,"oa_works_count":1,"cited_by_count":15},{"year":2019,"works_count":3,"oa_works_count":2,"cited_by_count":30},{"year":2020,"works_count":0,"oa_works_count":0,"cited_by_count":15},{"year":2021,"works_count":3,"oa_works_count":0,"cited_by_count":31},{"year":2022,"works_count":2,"oa_works_count":1,"cited_by_count":27},{"year":2023,"works_count":1,"oa_works_count":1,"cited_by_count":29},{"year":2024,"works_count":2,"oa_works_count":2,"cited_by_count":37},{"year":2025,"works_count":2,"oa_works_count":0,"cited_by_count":20},{"year":2026,"works_count":2,"oa_works_count":0,"cited_by_count":12}],"display_name_alternatives":["H Holl","H. G. Holl","H. G.\u00a0Holl","H. Holl","H.-G. Holl","H.G. Holl","Heinz-Gerd Holl","Heinz-gerd Holl","Holl, Heinz-Gerd"],"block_key":"h holl","works_api_url":"https://api.openalex.org/works?filter=author.id:A5064770201","updated_date":"2026-11-05T13:29:08","created_date":"2016-06-24T00:00:00"}
