Takahashi, M., Nishizawa, T., & Okamoto, H. (2003). Identification of a Genotype III Swine Hepatitis E Virus That Was Isolated from a Japanese Pig Born in 1990 and That Is Most Closely Related to Japanese Isolates of Human Hepatitis E Virus. American Society for Microbiology.

Takahashi, Masaharu, Tsutomu Nishizawa, and Hiroaki Okamoto. Identification of a Genotype III Swine Hepatitis E Virus That Was Isolated From a Japanese Pig Born in 1990 and That Is Most Closely Related to Japanese Isolates of Human Hepatitis E Virus. American Society for Microbiology, 2003.

Takahashi, Masaharu, Tsutomu Nishizawa, and Hiroaki Okamoto. Identification of a Genotype III Swine Hepatitis E Virus That Was Isolated From a Japanese Pig Born in 1990 and That Is Most Closely Related to Japanese Isolates of Human Hepatitis E Virus. American Society for Microbiology, 2003.