SYNCHRONIZATION OF OESTRUS IN HEIFERS AND CYCLIC COWS WITH PROGESTAGENS AND PROSTAGLANDINS ANALOGUES ALONE OR IN COMBINATION J. THIMONIER, D. CHUPIN and J. PELOTAnn. Biol. anim. Bioch. Biophys., 15 2 (1975) 437-449DOI: https://doi.org/10.1051/rnd:19750233