Leibel, W. , 2003. The Evolution of Mouthbrooding in South American Eartheaters. Journal of the American Cichlid Association 216 (June): 1-19.
Leibel, W., 2003. Evolutionary Transitions in Parental Care in Cichlid fish. Journal of the American Cichlid Association 215 (April): 18-23.
Leibel, W. 1995. Electrophoretic Analysis of LDH Phenotype Supports Splitting of the GenusGeophagus sensu Gosse (Teleostei, Cichlidae). Copeia 1995(1): 217 – 223.