Byington, Mark E., Christopher I. Beckwith, Koguryo – the Language of Japan's Continental Relatives (Leiden: Brill, 2004), Acta Koreana, 2006, 9 (1): 141–166.
Itabashi, Yoshizo, Kōkuri no chimei kara Kōkurigo to Chōsengo/Nihongo to no shiteki kankei wo saguru 高句麗の地名から高句麗語と朝鮮語・日本語との史的関係をさぐる [A study of the historical relationship of the Koguryo language, the Old Japanese language, and the Middle Korean language on the basis of fragmentary glosses preserved as place names in the Samguk sagi], Vovin, Alexander; Osada, Toshiki (编), Nihongo keitoron no genzai 日本語系統論の現在 [Perspectives on the Origins of the Japanese Language], Kyoto: International Center for Japanese Studies: 131–185, 2003, doi:10.15055/00005276(日语).
Lee, Ki-Moon; Ramsey, S. Robert, A History of the Korean Language, Cambridge University Press, 2011, ISBN 978-1-139-49448-9.
Lewin, Bruno, Japanese and Korean: The Problems and History of a Linguistic Comparison, The Journal of Japanese Studies, 1976, 2 (2): 389–412, JSTOR 132059.
———, From Koguryo to Tamna: Slowly riding to the South with speakers of Proto-Korean, Korean Linguistics, 2013, 15 (2): 222–240, doi:10.1075/kl.15.2.03vov.
Whitman, John, Northeast Asian Linguistic Ecology and the Advent of Rice Agriculture in Korea and Japan, Rice, 2011, 4 (3-4): 149–158, doi:10.1007/s12284-011-9080-0.
———, A History of the Korean Language, by Ki-Moon Lee and Robert Ramsey, Korean Linguistics, 2013, 15 (2): 246–260, doi:10.1075/kl.15.2.05whi.