M. Z. Junior, A. Yunianti, R. Dewi, and K. Sumawidjaja, “Effect of exposure time of pregnant females guppies, Poecilia reticulata Peters, in 17a-methyltestosterone solution on sex ratio of their offsprings”, Jurnal Akuakultur Indonesia, vol. 1, no. 1, pp. 47–54, May 2007, doi: 10.19027/jai.1.47-54.