^Sun J, Stephens R, Mirza G, Kanai H, Ragoussis J, Bird PI (Feb 1999). "A serpin gene cluster on human chromosome 6p25 contains PI6, PI9 and ELANH2 which have a common structure almost identical to the 18q21 ovalbumin serpin genes". Cytogenet Cell Genet. 82 (3–4): 273–7. doi:10.1159/000015118 (inactive 2024-07-26). PMID9858835. S2CID23659776.{{cite journal}}: CS1 maint: DOI inactive as of July 2024 (link)