West, John B.; Ravichandran. Snorkel breathing in the elephant explains the unique anatomy of its pleura. Respiration Physiology. 1993, 126 (1): 1–8. PMID 11311306. doi:10.1016/S0034-5687(01)00203-1.引文使用过时参数coauthors (帮助)
Respiration. Harvey Project. [27 July 2012]. (原始内容存档于2018-12-28).
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West, John B.; Ravichandran. Snorkel breathing in the elephant explains the unique anatomy of its pleura. Respiration Physiology. 1993, 126 (1): 1–8. PMID 11311306. doi:10.1016/S0034-5687(01)00203-1.引文使用过时参数coauthors (帮助)
West, John B. Why doesn't the elephant have a pleural space?. News Physiol Sci. 2002, 17: 47–50. PMID 11909991.