Hajime Arai, Yukio Morita, Kunihiro Nobusawa, Masanao Arai, Sumalee Boonmar, and Hirokazu Kimura. 2004. “Prevalence of Flavobacterium psychrophilum Infection in Ayu (Plecoglossus altivelis) in Gunma Prefecture, Japan and Comparison of the gyr B Sequences of Isolates”. Agriculture and Natural Resources 38 (4). Bangkok, Thailand:523-30. https://li01.tci-thaijo.org/index.php/anres/article/view/243202.