Erol Tunç, A., and Y. CUFADAR. “Effect of Calcium Sources and Particle Size on Performance and Eggshell Quality in Laying Hens”. Turkish Journal of Agriculture - Food Science and Technology, vol. 3, no. 4, Dec. 2014, pp. 205-9, doi:10.24925/turjaf.v3i4.205-209.262.