Cannon MS, Hostetler JR (February 1976). "The anatomy of the parotoid gland in Bufonidae with some histochemical findings. II. Bufo alvarius". Journal of Morphology. 148 (2): 137–60. doi:10.1002/jmor.1051480202. PMID1254079. S2CID22652419.
Hutchinson DA, Savitzky AH (May 2004). "Vasculature of the parotoid glands of four species of toads (Bufonidae: Bufo)". Journal of Morphology. 260 (2): 247–54. doi:10.1002/jmor.10219. PMID15108163. S2CID41677294.
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Cannon MS, Hostetler JR (February 1976). "The anatomy of the parotoid gland in Bufonidae with some histochemical findings. II. Bufo alvarius". Journal of Morphology. 148 (2): 137–60. doi:10.1002/jmor.1051480202. PMID1254079. S2CID22652419.
Hutchinson DA, Savitzky AH (May 2004). "Vasculature of the parotoid glands of four species of toads (Bufonidae: Bufo)". Journal of Morphology. 260 (2): 247–54. doi:10.1002/jmor.10219. PMID15108163. S2CID41677294.
Cannon MS, Hostetler JR (February 1976). "The anatomy of the parotoid gland in Bufonidae with some histochemical findings. II. Bufo alvarius". Journal of Morphology. 148 (2): 137–60. doi:10.1002/jmor.1051480202. PMID1254079. S2CID22652419.
Hutchinson DA, Savitzky AH (May 2004). "Vasculature of the parotoid glands of four species of toads (Bufonidae: Bufo)". Journal of Morphology. 260 (2): 247–54. doi:10.1002/jmor.10219. PMID15108163. S2CID41677294.