Sources of variation and genetic profile of spontaneous, out-of-season ovulatory activity in the Chios sheep Melpomeni Avdi, Georgios Banos, Athanasios Kouttos, Loys Bodin and Philippe Chemineau Genet. Sel. Evol., 35 1 (2003) 65-76 DOI: 10.1051/gse:2002036