Puk, Chung, Rŏ chŏpkyŏng chidae rŭl tullŏssan sojiyŏkchuŭi chŏllyak kwa ch'ogukkyŏng idong = Strategies for subregionalism and transborder mobility in/around North Korea-China-Russia border area - Sin, Pŏm-sik (Tosŏ Ch'ulp'an Ijo, 2020)