TSELKAS (Κ. ΤΣΕΛΚΑΣ) K., YPSILANTIS (Π. ΥΨΗΛΑΝΤΗΣ) P., and SARATSIS (Φ. ΣΑΡΑΤΣΗΣ) P., “Study of the efficacy and safety of proligestone administration for the control of the ovarian cycle in the bitch”, J Hellenic Vet Med Soc, vol. 49, no. 1, pp. 44–47, Jan. 2018.