00758naa#a2200181#i#450# EN\\bibl\119105 20260406102743.1 1815-588X 20260331b2026####ek#y0engy0150####ca RU Reconstruction of cantilever stone staircases in the architecture of St. Petersburg. Part 3: how to calculate a straight flight staircase with plane treads Journal article Saint-Petersburg FSBEI HE "Emperor Alexander I St. Petersburg State Transport University" 2026 9 с. Journal article local Лестницы. Пандусы. Лифты. Эскалаторы. 692.6 Weber Mikhail Davidowich Kuznecov Anatoliy Vsevolodovich brni.editorum.ru