Oliver, P., Richards, S. and Tjaturadi, B. 2012.

Two new species of Callulops (Anura: Microhylidae) from montane forests in New Guinea

. Zootaxa. 3178, 1 (Jan. 2012), 33–44. DOI:https://doi.org/10.11646/zootaxa.3178.1.3.