Article Title,Year,Volume,Issue,Page Range,Author Physiology of skiing,1950,14,3,292-303,Hohwu christensen Studies on the wood transportation with sleighs in wintery high mountains,1953,15,1,47-56,Kaminsky Energy consumption in hand and motor driven plows,1953,15,1,41-46,Hettinger Study of bicycle modifications using a motor driven treadmill-bicycle ergometer,1953,15,1,23-32,Astrand