Anastasi A, Erspamer V, Endean R (September 1967). "Isolation and structure of caerulein, an active decapeptide from the skin of Hyla caerulea". Experientia. 23 (9): 699–700. doi:10.1007/BF02154119. PMID6062875.
Anastasi A, Erspamer V, Endean R (September 1967). "Isolation and structure of caerulein, an active decapeptide from the skin of Hyla caerulea". Experientia. 23 (9): 699–700. doi:10.1007/BF02154119. PMID6062875.