Sachs, M., A. Bar, O. Nir, D. Ochovsky, B. Machnai, E. Meir, B. Z. Weiner, and Z. Mazor. “Efficacy of 1α Hydroxyvitamin D3 in the Prevention of Bovine Parturient Paresis”. The Bovine Practitioner, no. 22, Nov. 1987, pp. 117-20, doi:10.21423/bovine-vol0no22p117-120.