00603naa#a2200169#i#450# EN\\bibl\119570 20260410124304.5 2782-4586 20260403b2026####ek#y0engy0150####ca RU Flow-Cluster Model of a Region as a Structural Foundation for the Formation of a Circular Economy Journal article Moscow ITBO University 2026 6 с. Journal article local Экономические науки в целом. Политическая экономия. 330 Zharikov Il'ya Nikolaevich zhpi.ru