P. Hartman
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      Replacement of the First GnRH Administration in the Ovsynch Protocol by Selecting Cows According to the Stage of Follicular Development
      P. Hartman, J. Zajíc, S. Čech, Z. Jan, R. Doležel 2006, Vol. 75, Issue 1, pp. 65-72
P. Hartman, J. Zajíc, S. Čech, Z. Jan, R. Doležel