TY - BOOK AU - Rozenvasser, E. N. ED - Symposium on nonlinear vibrations TI - ˆThe ‰integral equations used for the verification of some approximate method in construction of periodic regimes in non-linear systems PY - 1961/// CY - L. PB - Polytechnical inst. KW - Санкт-Петербург KW - Мх-36 KW - rubbk N2 - Библиогр.: с. 11 ER -