1. M. Gardner, The Histogenesis and Structure of Elastic Tissue [in Russian] Dissertation. (Moscow, 1898).
2. M. M. Kuznets, in: Old Age [in Russian] (Kiev, 1940) p. 117.
3. U. F. Lever Histopathology of the Skin [in Russian] (Moscow, 1958) p. 174.
4. G. V. Orlovskaya, Morphological Features due to Age in the Skin of the Face. Candidate dissertation [in Russian] (Moscow, 1947).
5. A. V. Rusakov, The Physiology and Pathology of Certain Tissues of the Internal Environment. Incomplete Desmogenesis [in Russian] (Moscow, 1954) p. 35.