00652naa#a2200181#i#450# EN\\bibl\7473 20260101174417.4 2409-7829 20150427b2015####ek#y0engy0150####ca RUS RU CALCULATION OF TRACTION AND ENERGY CHARACTERISTICS OF METRO WITH DIFFERENT ELECTRIC TRACTION SYSTEMS BY PROGRAM «MATHCAD» Journal article Voronezh FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov 2015 4 с. Journal article local Le Xuan Hong Tulupov V. zh-szf.ru