Chatchavalvanich, K. & Marcos, R. & Poonpirom, J. & Thongpan, A. & Rocha, E. (2006)
Histology of the digestive tract of the freshwater stingray Himantura signifer Compagno and Roberts, 1982 (Elasmobranchii, Dasyatidae).
Anatomy and Embryology, 211(5), 507–518 DOI: 10.1007/s00429-006-0103-3