00631naa#a2200181#i#450# EN\\bibl\104351 20251010002715.5 1815-588X 20250919b2025####ek#y0engy0150####ca RU Vertical Natural Frequency Vibrations of Non-Massive Bridge Supports Journal article Saint-Petersburg FSBEI HE "Emperor Alexander I St. Petersburg State Transport University" 2025 6 с. Journal article local Части сооружений. 624.02 Smirnov Vladimir Nikolaevich Lang Andrey Vladimirovich itt-pgups.ru