Accurate temperature measurement of interface between ski and snow surface for frictional heating evaluation - Okajima, J.; Okabe, T.; Miyamoto, N.; Morimoto, T.; Hatakeyama, N.; Tsunoda, K.; Sasaki, T.; Kosugi, K.; Ito, K.; Suzuki, M.; Shoji, T.; Maruyama, S.; et al. (Science and Skiing VII, 2018)