Timisjärvi, J., M. Nieminen, J. Leppäluoto, T. Lapinlampi, P. Saukko, E. Eloranta, and P. Soppela. “Effects of running and immobilization on blood constituents in the reindeer”. Rangifer, vol. 10, no. 3, Sept. 1990, p. 419, doi:10.7557/2.10.3.890.