Basic Formal Ontology

1. https://github.com/bfo-ontology/BFO/wiki
2. http://www.ontobee.org/ontology/BFO?iri=http://purl.obolibrary.org/obo/BFO_0000030
3. http://ontology.buffalo.edu/bfo/BFO2.png
4. http://ncorwiki.buffalo.edu/index.php/Basic_Formal_Ontology_2.0
5. http://basic-formal-ontology.org/
6. https://www.sciencedirect.com/science/article/pii/S1877050919307380

Release

https://ncorwiki.buffalo.edu/index.php/BFO_Release_History:_From_BFO_1_to_BFO-ISO

1. 2001 : BFO 1
2. 2007 : BFO 1.1
3. 2015 : BFO 2
4. 2020 : BFO-2020

Third party comment

Fiat - Bona Fide

1. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3520998/ - Fiat or Bona Fide Boundary—A Matter of Granular Perspective