Protein Ontology: a controlled structured network of protein entities. - Darren A. Natale; Cecilia N. Arighi; Judith A. Blake; Carol J. Bult; Karen R. Christie; Julie Cowart; Peter D'Eustachio; Alexander D. Diehl; Harold J. Drabkin; Olivia Helfer; Hongzhan Huang; Anna Maria Masci; et al. (Nucleic Acids Res., 2014)

The ImmPort Antibody Ontology. - William D. Duncan; Travis Allen; Jonathan P. Bona; Olivia Helfer; Barry Smith 001; Alan Ruttenberg; Alexander D. Diehl (ICBO/BioCreative, 2016)