00541naa#a2200169#i#450# EN\\bibl\14346 20241104030019.1 1999-8775 20161228b2016####ek#y0engy0150####ca RUS RU PERIODIC SOLUTIONS PROBLEM OF HETEROGENEOUS STRING FORCED OSCILLATIONS EQUATION WITH BOUNDARY CONDITION OF THE THIRD TYPE Journal article Bryansk Bryansk State Technical University 2016 8 с. Journal article local Rudakov Igor naukaru.ru