H. Pérez-Cortés M., C. A. Barrera A., and F. Ollervides, “First record of humpback whale (<i>Megaptera novaeangliae</i>) mother and calf inside Bahia Magdalena, Baja California Sur, Mexico”, Lat. Am. J. Aquat. Mamm., vol. 5, no. 1, pp. 77-79, Jun. 2006.