{{Cite book| publisher = C.N.R.S.| pages = 327–331| last1 = Constant| first1 = Pierre| last2 = Eybert| first2 = Marie-Christine| last3 = Mahéo| first3 = Roger| title = C.R. Table ronde C.N.R.S . "Ecosystèmes bocagers"| chapter = Avifaune reproductrice du bocage de l'ouest| location = Rennes| date = 1976}}