TY  - RPRT
TI  - The estrus detection problem: new concepts, technologies, and possibilities.
AU  - P L Senger
PY  - 1994
DO  - 10.3168/jds.s0022-0302(94)77217-9
UR  - https://pubmed.ncbi.nlm.nih.gov/7814743/
ID  - 7814743
ER  -