1. 1. Arakawa, Y. 2007. Approaches for evaluation of working capacity of the heavy draft horse at the National Livestock Breeding Center Tokachi Station. Hippophile 27: 1–3 [in Japanese].
2. 2. Arakawa, Y. 2008. Exercise physiological analysis of pulling work of the heavy draft horse: heart rate and blood lactate during exercise. Hippophile 32: 17–18 [in Japanese].
3. 3. Bayly, W.M., Grant, B.D., and Pearson, R.C. 1987. Lactate concentrations in Thoroughbred horses following maximal exercise under field conditions. pp. 426–437. In: Equine Exercise Physiology 2 (Gillespie, J.R., and Robinson, N.E. eds.), ICEEP Publications, Davis.
4. 4. Fuchimukai, M., Kukita, M., Kikuchi, T., Komatsu, Y., Shishido, H., and Sawaguchi, Y. 1960. Studies on characteristics of horse breed: on the farm plowing test. Tohoku Nogyo Kenkyu 2: 206–207 [in Japanese].
5. 5. Habu, Y., and Okamoto, M. 1949. Studies on the gas metabolism of cattle. I. On the resting metabolism of the cow. Nihon Chikusan Gakkaiho 19: 79–81 [in Japanese with English summary].