{{cite journal | last1=Calderón-Robles | first1=R. C. | author2=A. Ríos-Utrera | author3=V. E. Vega-Murillo | author4=M. Montaño-Bermúdez | author5=G. Martínez-Velázquez | author6=S. I. Román-Ponce | author7=R. Calderón-Chagoya | year=2017 | title=REPRODUCTION OF HOLSTEIN AND BROWN SWISS COWS AND OF THEIR F1 RECIPROCAL CROSSES RAISED IN A MEXICAN SUBTROPICAL ENVIRONMENT | journal=Journal of Animal and Plant Sciences | volume=27 | issue=6 | pages=1816-1821 | issn=1018-7081 | eissn=2309-8694 | publisher=Pakistan Agricultural Scientists Forum | url=https://thejaps.org.pk/AbstractView.aspx?mid=2017-JAPS-229}}