Masagca, J. T., & Ordonez, J. A. (2008). CHROMOSOMES OF THE PHILLIPINE SNAKE-HEAD GUDGEON, OPHIELEOTRIS APOROS (ELEOTRIDAE) FROM LAKE TAAL, LUZ ON ISLAND. BIOTROPIA, 14(1), 1–8. https://doi.org/10.11598/btb.2007.14.1.20