Suzuki, N. & Takagi, T. & Sasayama, Y. & Kambegawa, A. (1995)
Effects of Ultimobranchialectomy on the Mineral Balances of the Plasma and Bile in the Stingray (Elasmobranchii). Zoological Science, 12(2), 239–242
DOI: 10.2108/zsj.12.239

Sasayama, Y. & Matsuda, K. & Oguro, C. & Kambegawa, A. (1989)
Immunohistochemical Demonstration of Calcitonin Gene-Related Peptide in the Ultimobranchial Gland of Some Lower Vertebrates and in the Nervous Tissues of Some Invertebrates. Zoological Science, 6(2), 423–426

Sasayama, Y. & Oguro, C. & Yui, R. & Kambegawa, A. (1984)
Immunobistochemical Demonstration of Calcitonin in Ultimobranchial Glands of Some Lower Vertebrates. Zoological Science, 1(5), 755–758