Graczyk, T. K., Cranfield, M. R., Fayer, R., Trout, J., & Goodale, H. J. (2007). Infectivity of Cryptosporidium parvum oocysts is retained upon intestinal passage through a migratory water‐fowl species (Canada goose, Branta canadensis). Trop Med Int Health.

Graczyk, Thaddeus K., Michael R. Cranfield, Ronald Fayer, James Trout, et Holly J. Goodale. "Infectivity of Cryptosporidium Parvum Oocysts Is Retained Upon Intestinal Passage Through a Migratory Water‐fowl Species (Canada Goose, Branta Canadensis)." Trop Med Int Health 2007.

Graczyk, Thaddeus K., et al. "Infectivity of Cryptosporidium Parvum Oocysts Is Retained Upon Intestinal Passage Through a Migratory Water‐fowl Species (Canada Goose, Branta Canadensis)." Trop Med Int Health 2007.