1. P. P. Dvizhkov, M. S. Tolgskaya, and G. P. Sokolova, Abstracts of Proceedings of a Conference on the Pneumoconioses at the Institute of Work Hygiene and Occupational Diseases [in Russian], Moscow (1963), p. 8.
2. A. G. E. Pearse, Histochemistry [Russian translation], Moscow (1962).
3. V. V. Portugalov, In the book: Plastic and Repair Processes [in Russian], Moscow (1959), p. 202.
4. N. T. Raikhlin, In the book: Histochemical Methods in Normal and Pathological Morphology [in Russian] Moscow (1958), p. 145.
5. N. T. Raikhlin, In the book: Proceedings of a Symposium on Connective Tissue [in Russian], Moscow (1960), p. 99.