SANTOS, R. C., I. D. A. NÄÄS, and M. R. LABIGALINI. “DEVELOPMENT OF A MODEL FOR ESTIMATED TO ESTRO OF DAIRY CATTLE USING FUZZY LOGIC”. Revista Brasileira De Engenharia De Biossistemas, vol. 1, no. 3, Nov. 2007, pp. 265-70, doi:10.18011/bioeng2007v1n3p265-270.