@article{beltran_vasconcelos_2008,  title={Conception rate in Holstein cows treated with GnRH or hCG on the fifth day post artificial insemination during summer},  volume={60},  ISSN={0102-0935},  url={https://doi.org/10.1590/S0102-09352008000300009},  DOI={10.1590/S0102-09352008000300009},  number={3},  journal={Arquivo Brasileiro de Medicina Veterinária e Zootecnia},  publisher={Universidade Federal de Minas Gerais, Escola de Veterinária},  author={Beltran, M.P. and Vasconcelos, J.L.M.},  year={2008},  month={Jun},  pages={580–586} }