Suttie, J. M., White, R. G., Manley, T. R., Breier, B. H., Gluckman, P. D., Fennessy, P. F. and Woodford, K. (1993) “Insulin-like growth factor 1 and growth seasonality in reindeer (Rangifer tarandus) - comparisons with temperate and tropical cervids”, Rangifer, 13(2), pp. 91–97. doi: 10.7557/2.13.2.1095.