@inbook{inbook5408b0fc,
title   = {Estrous cycle of heifers and lactating dairy cows: ovarian and hormonal dynamics and estrous cycle abnormalities},
author = {Sartori Filho, Roberto and Pursley, J. R and Wiltbank, M. C},
year = {2017},
doi = {10.3168/ldhm.0736},
publisher = {American Dairy Science Association},
journal   = {Large Dairy Herd Management. Section 7: Reproduction and reproductive management}
}