@article{article51bce45f,
title   = {Influence of the duration of calving and obstetric assistance on the placental retention index in Holstein dairy cows},
author = {Vannucchi, Camila Infantosi and Silva, Liege Cristina Garcia da and Lúcio, Cristina de Fátima and Veiga, Giselle Almeida Lima da},
year = {2017},
doi = {10.1111/asj.12667},
journal   = {Animal Science Journal}
}