Baranano DE, Rao M, Ferris CD, Snyder SH. Biliverdin reductase: a major physiologic cytoprotectant. Proc. Natl. Acad. Sci. U.S.A. 2002, 99 (25): 16093–8. PMID 12456881. doi:10.1073/pnas.252626999.
Liu Y, Li P, Lu J, Xiong W, Oger J, Tetzlaff W, Cynader M. Bilirubin possesses powerful immunomodulatory activity and suppresses experimental autoimmune encephalomyelitis. J. Immunol. 2008, 181 (3): 1887–97. PMID 18641326.