Alon, Assaf; Schmidt, Hayden R.; Wood, Michael D.; Sahn, James J.; Martin, Stephen F.; Kruse, Andrew C. (2017-05-30). "Identification of the gene that codes for the σ2 receptor". Proceedings of the National Academy of Sciences. 114 (27): 7160–7165. doi:10.1073/pnas.1705154114. ISSN 0027-8424. PMC 5502638. PMID 28559337. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5502638