PACS:36.20.Fz, 87.15.By (all) DOI:10.1070/PU1981v024n08ABEH004835 URL: https://ufn.ru/en/articles/1981/8/c/ Citation: Frank-Kamenetskii M D, Vologodskii A V "Topological aspects of the physics of polymers: The theory and its biophysical applications" Sov. Phys. Usp.24 679–696 (1981)