@article{articled5bc014b,
title   = {Positive and negative effects of progesterone during timed AI protocols in lactating dairy cattle},
author = {Wiltbank, M. C and Souza, A. H and Giordano, J. O and Nascimento, A. B and Pereira, M. H. C and Fricke, P. M and Surjus, R. S and Zinsly, F. C. S and Carvalho, P. D and Bender, R. W and Sartori Filho, Roberto},
year = {2012},
journal   = {Animal Reproduction}
}