Ruggiero, Marco, et al. “Intra-Tumoural Nitric Oxide Release by Macrophages Activated by Gc-Protein-Derived Macrophage Activating Factor (GcMAF)”. Italian Journal of Anatomy and Embryology, vol. 119, no. 1, Mar. 2015, p. 170, doi:10.36253/ijae-2523.