Angioletti A, De Francesco I, Vergottini M, Battocchio M L
Department of Veterinary Clinical Science, Section of Veterinary Obstetrics and Gynecology, Faculty of Veterinary Medicine, University of Milan, Italy.
Vet Res Commun. 2004 Aug;28 Suppl 1:153-5. doi: 10.1023/b:verc.0000045394.31433.9e.