TY JOUR TI Eurasian Economic Union: Borders Extension and Legal Reality KW integration KW Eurasian Economic Union KW international agreement KW international organization KW Russian Federation KW Republic of Belarus KW Republic of Kazakhstan KW Republic of Armenia KW Kyrgyz Republic KW international legal personality KW extension. JO Journal of Russian Law AU Kashirkina, A.. PY 2016 IS 4 PB Legal publishing house Norm