Dovzhenko О, Pogribnyi V, Chursa Y. VARIATIONAL METOD APPLIED IN CALCULATION OF KEY JOINT’S STRENGTH IN THE CURRENT CONSTRUCTION SYSTEMS. znp. 2017;2(47):133-139. дата звернення Червень 6, 2026. https://ojs35.politeh.duckdns.org/znp/article/view/77