TY JOUR TI The choice of the rolling stock for public transportation: problem statement and solution approaches KW railway transportation KW optimal wagon-loading options KW public transportation KW efficiency KW empty-wagon flows JO Proceedings of Petersburg Transport University AU Kobozeva, N.G. AU Novichihin, A.V. PY 2026 IS 23 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"