TY JOUR TI Theoretical and Methodological Foundations of the Resource–Flow Method (RFM+) for the Representation of Technological Chains KW resource–flow method; process–product tables; input–output tables; logarithm of value-added productivity; estimated costs of technological processes; technological chain; potential graph JO Theoretical economics AU Dashut, E.S. PY 2026 IS 0 PB Yaroslavl State Technical University