N. J. C. Tyler, H. Jalanka, R. Hotvedt, A. S. Blix, and D. R. Sørensen, “Immobilization of three sub-species of reindeer (Rangifer tarandus) with medetomidine and medetomidine-ketamine and reversal of immobilization with atipamezole”, Ran, vol. 10, no. 4, pp. 65–66, Sep. 1990.