1. G. V. Iyengar, Elemental Composition of Human and Animal Milk, IAEA, TEC DOC-269, 1982.
2. G. V. Iyengar, et al., Elemental Composition of Human Tissues and Body Fluids, Verlag Chemie, FRG, 1978.
3. V. A. Malhora, M. B. A. Vasconcellos,J. Radioanal. Nucl. Chem., Articles, 122 /1988/ 161.
4. F. Kurzer, Organic Chemistry Synthesis, J. Wiley and Sons, Inc., New York, 1955.