Characterization of the variable cow's age at last calving as a measurement of longevity by using the Kaplan–Meier estimator and the Cox model

Publisher： Cambridge University Press

E-ISSN： 1751-732x|7|4|540-546

ISSN： 1751-7311

Source： animal, Vol.7, Iss.4, 2012-10, pp. : 540-546

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