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Hirsbrunner, Gabriela; Burkhardt, Heinz W; Steiner, Adrian (2006). Effects of a single administration of prostaglandin F2alpha, or a combination of prostaglandin F2alpha and prostaglandin E2, or placebo on fertility variables in dairy cows 3-5 weeks post partum, a randomized, double-blind clinical trial. Reproductive biology and endocrinology, 4(65), pp. 1-8. London: BioMed Central 10.1186/1477-7827-4-65
