00763naa#a2200181#i#4500001001600000005001700016011001400033100004100047102000700088200017200095210010100267215001100368608002700379675007800406700003000484700003700514856003000551EN\\bibl\10437420250926103715.5##a1815-588X##a20250919b2025####ek#y0engy0150####ca##aRU1#aOn Restoring Cantilever Stone Staircases in the Architecture of St. Petersburg. Part 2. How to Calculate a Straight Flight Staircase with Plane TreadseJournal article1#aSaint-PetersburgcFSBEI HE "Emperor Alexander I St. Petersburg State Transport University"d2025##a10 с.##aJournal article2local##aЛестницы. Пандусы. Лифты. Эскалаторы. 692.6#1aWebergMikhail Davidowich#1aKuznecovgAnatoliy Vsevolodovich4#aizvestiapgups.editorum.ru