TY JOUR TI Methodology for Selecting Locations and Procuring Materials for the Rehabilitation of Railway Track Superstructures by the Railway Troops and Structural Subdivisions of JSC “Russian Railways” KW Materials for the track superstructure KW procurement KW rehabilitation of railways KW mathematical model KW logistics system KW target function KW model constraints JO Proceedings of Petersburg Transport University AU Miroshnik, A.A. PY 2025 IS 22 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"