Ortega-Salas, A., Reyes-Bustamante, H. and Reyes B., H. (2013) “Sex reversal, growth, and survival in the swordtail fish Xiphophorus helleri (Cyprinodontiformes: Poeciliidae) under laboratory conditions”, UNED Research Journal, 5(2), pp. 235–239. doi: 10.22458/urj.v5i2.274.