Factors Affecting the Distribution of the Japanese Weasel Mustela itatsi and the Siberian Weasel M. sibirica in Japan Sasaki, Hiroshi and Ohta, Kyoko and Aoi, Toshiki and Watanabe, Shigeki and Hosoda, Tetsuji and Suzuki, Hitoshi and Abe, Mikiko and Koyasu, Kazuhiro and Kobayashi, Syuji and Oda, Sen-ichi, Mammal Study, 39, 133-139 (2014), DOI:http://dx.doi.org/10.3106/041.039.0302