00758naa#a2200181#i#4500001001600000005001700016011001400033100004100047102000700088200017700095210010100272215001000373608002700383675007800410700003000488700003700518856002100555EN\\bibl\11910520260406102724.1##a1815-588X##a20260331b2026####ek#y0engy0150####ca##aRU1#aReconstruction of cantilever stone staircases in the architecture of St. Petersburg. Part 3: how to calculate a straight flight staircase with plane treadseJournal article1#aSaint-PetersburgcFSBEI HE "Emperor Alexander I St. Petersburg State Transport University"d2026##a9 с.##aJournal article2local##aЛестницы. Пандусы. Лифты. Эскалаторы. 692.6#1aWebergMikhail Davidowich#1aKuznecovgAnatoliy Vsevolodovich4#abrni.editorum.ru