Tomotsugu Yazaki, Yukiyoshi Iwata, Tomoyoshi Hirota, Yasuhiro Kominami, Toshikazu Kawakata, Takeo Yoshida, Yosuke Yanai, Satoshi Inoue. Influences of winter climatic conditions on the relation between annual mean soil and air temperatures from central to northern Japan. COLD REGIONS SCIENCE AND TECHNOLOGY. 2013. 85. 217-224