Physiological estimation of high altitude training effects - Applicatuion of C2H2, C18O, O2 and Ar mixture breathing - Nishi, I.; Masuyama, S.; Nomura, T.; Wakagayashi, H.; Ashida, A.; Matsumoto, K.; Niwa, M.; Koga, H. (Advances in Exercise and Sports Physiology, 2004)