^Singh UP, Ardelt W, Saxena SK, Holloway DE, Vidunas E, Lee HS, Saxena A, Shogen K, Acharya KR (August 2007). "Enzymatic and structural characterisation of amphinase, a novel cytotoxic ribonuclease from Rana pipiens oocytes". Journal of Molecular Biology. 371 (1): 93–111. doi:10.1016/j.jmb.2007.04.071. PMID17560606.
^Singh UP, Ardelt W, Saxena SK, Holloway DE, Vidunas E, Lee HS, Saxena A, Shogen K, Acharya KR (August 2007). "Enzymatic and structural characterisation of amphinase, a novel cytotoxic ribonuclease from Rana pipiens oocytes". Journal of Molecular Biology. 371 (1): 93–111. doi:10.1016/j.jmb.2007.04.071. PMID17560606.