Ropstad, E. and Lenvik, D. 1991. The use of Cloprostenol and prostaglandin F2alpha to induce luteolysis in reindeer calves (Rangifer tarandus). Rangifer. 11, 1 (Oct. 1991), 13–16. DOI:https://doi.org/10.7557/2.11.1.968.