TY JOUR TI The Mechanical Engineering as the System-Forming Branch of the Tula Region Economy KW mechanical engineering KW gross value added KW machines and equipment KW regional economy KW Tula region JO Scientific Research and Development. Economics AU Lomovcev, D.A. AU Lomovcev, P.D. AU Bobkov, A.S. PY 2026 IS 14 PB INFRA-M Academic Publishing LLC.