00667naa#a2200169#i#450# EN\\bibl\119379 20260709235028.4 2782-4586 20260630b2026####ek#y0engy0150####ca RU BORDER COOPERATION BETWEEN THE REPUBLIC OF KAZAKHSTAN AND THE RUSSIAN FEDERATION AT THE PRESENT STAGE: DEVELOPMENT CHARACTERISTICS, PROBLEMS, AND PERSPECTIVES Journal article Moscow ITBO University 2026 8 с. Journal article local Региональная экономика. Территориальная экономика. 332.1 Pritula Evgeniya Evgenyevna zhpi.ru