A Controlled Crowdsourcing Approach for Practical Ontology Extensions and Metadata Annotations. - Yolanda Gil; Daniel Garijo; Varun Ratnakar; Deborah Khider; Julien Emile-Geay; Nicholas McKay (ISWC (2), 2017)

The Linked Earth Ontology: A Modular, Extensible Representation of Open Paleoclimate Data. - Julien Emile-Geay; Deborah Khider; Daniel Garijo; Nicholas McKay; Yolanda Gil; Varun Ratnakar; Elizabeth Bradley (Zenodo, 2019)