Ohta, Y.; Nishinki, M. (1999). "Random nucleotide substitutions in primate nonfunctional gene for L-gulono-gamma-lactone oxidase, the missing enzyme in L-ascorbic acid biosynthesis". Biochimica et Biophysica Acta (BBA) - General Subjects. 1472 (1–2): 408–411. doi:10.1016/S0304-4165(99)00123-3. PMID10572964.
Hall, B. (1982). "Evolution in a petri dish: The evolved β-Galactosidase system as a model for studying acquisitive evolution in the laboratory". Evolutionary Biology. doi:10.1007/978-1-4615-6968-8_2.
Ohta, Y.; Nishinki, M. (1999). "Random nucleotide substitutions in primate nonfunctional gene for L-gulono-gamma-lactone oxidase, the missing enzyme in L-ascorbic acid biosynthesis". Biochimica et Biophysica Acta (BBA) - General Subjects. 1472 (1–2): 408–411. doi:10.1016/S0304-4165(99)00123-3. PMID10572964.