Dynamics of body calcium and net calcium requirements for maintenance of Saanen goats - Dorigan, Cláudia Josefina; Vargas, J. A. C; Härter, C. J; Resende, Kleber Tomas de; Vitti, Dorinha Miriam Silber Schmidt; Abdalla, Adibe Luiz; Teixeira, I. A. M. A (The Journal of Agricultural Science, 2018)