6McLaren CJ;Lissemore KD;Duffield TF.The association of herd milk production and management with a return-over-feed index in Ontario dairy herds[J],2005(01).
7Maizon DO;Oltenacu PA;Grohn YT.Effects of diseases on reproductive performance in Swedish Red and White dairy cattle[J],2004(66).
8Klaas IC;Enevoldsen C;Ersboll AK.Cow-related risk factors for milk leakage[J],2005(01).
