An asymptotic investigation of the natural oscillations of a non-uniform rectangle with an internal opening

Vovk L.E.2026-09-172001Legacy ID: 17804KeyMain: Vovk(2001)KeyGoogle: Vovk(2001)Anhttps://ipm.lviv.ua/dspace/handle/123456789/511An asymptotic investigation of the natural oscillations of a non-uniform rectangle with an internal openingArticle