ΤΣΑΚΑΛΩΦ Π., ΣΑΡΑΤΣΗΣ Φ., and ΠΑΠΑΜΑΡΤΖΙΒΑΝΟΣ Χ., “Oestrus synchronization in cows and heifers with PGF2 a”, J Hellenic Vet Med Soc, vol. 33, no. 2, pp. 131–138, Dec. 2019.