Leible, M.D. (1988)
Revisión de métodos para estudios taxonómicos de rayas (Rajiformes, Rajidae). Gayana Zoologica, 52, 15–93
Leible, M.D. & Stehmann, M. (1987)
First records of Raja (Dipturus) trachyderma Krefft & Stehmann, 1975 from the Southeastern Pacific off Chile, with first descriptions of its Clasper characters and additional skeletal and morphological details (Pisces, Rajiformes, Rajidae). Studies on Neotropical Fauna and Environment, 22(4), 169–188