Relationships among ß-hydroxybutyrate, calcium and non-esterified fatty acids in blood with milk yield losses at early lactation. - López-Ordaz, Rufino; Pérez-Hernández, Gabriela; Alonso Ramírez-Ramírez, Hugo; López-Ordaz, Reyes; David Mendoza-Martínez, Germán; Ruíz-Flores, Agustín (Revista Mexicana de Ciencias Pecuarias, 2021)