Gopalan RC, Emerce E, Wright CW, Karahalil B, Karakaya AE, Anderson D. Effects of the anti-malarial compound cryptolepine and its analogues in human lymphocytes and sperm in the Comet assay. Toxicol Lett. 2011 Dec 15;207(3):322–5. doi: 10.1016/j.toxlet.2011.09.010. PMID: 21946165.