↑ Ornithology, Volume 1994 By Frank B. Gill p. 361
↑ James, John M.; Zeiger, Robert S.; Lester, Mitchell R.; Fasano, Mary Beth; Gern, James E.; Mansfield, Lyndon E.; Schwartz, Howard J.; Sampson, Hugh A.; Windom, Hugh H. (1998). “Safe administration of influenza vaccine to patients with egg allergy”. The Journal of Pediatrics 133 (5): 624–8. PMID9821418. doi:10.1016/S0022-3476(98)70101-5.
