Janusz, M., and A. ZabÅ‚ocka. “Colostrinin: A Proline-Rich Polypeptide Complex of Potential Therapeutic Interest”. Cellular and Molecular Biology, vol. 59, no. 1, Nov. 2013, pp. 4-11, https://mail.cellmolbiol.org/index.php/CMB/article/view/478.