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Xu, Zhen-Hua; Otterness, Diane M.; Freimuth, Robert R.; Carlini, Edward J.; Wood, Thomas C.; Mitchell, Steve; Moon, Eunpyo; Kim, Ung-Jin; Xu, Jing-Ping; Siciliano, Michael J.; Weinshilboum, Richard M. (February 2000). "Human 3′-Phosphoadenosine 5′-Phosphosulfate Synthetase 1 (PAPSS1) and PAPSS2: Gene Cloning, Characterization and Chromosomal Localization". Biochemical and Biophysical Research Communications. 268 (2): 437–444. doi:10.1006/bbrc.2000.2123. PMID10679223.