1. Beard M. F., McIlvanie S. K. (1951). Vitamin B12 as a hemotherapeutic agent. Proceedings of the 3rd international congress of the international society of hematology, 1st Ed., ed. by Moore C. V. New York. Grune & Stratton. P. 34.
2. Prolonged treatment of pernicious anemia with vitamin B12
3. Dacie J. V. (1950). Practical haematology, 1st Ed. London. Churchill. P. 8, 57.
4. THE PHENOMENON OF RETICULATION AND THE ALTERATION IN SIZE OF THE RED BLOOD CORPUSCLES AFTER LIVER THERAPY.
5. Davis L. J., Brow N. A. (1953). The megaloblastic anaemias, 1st Ed. Oxford. Blackwell. P. 27.