Chen, Yuan Julian (iulie 2018). „FRONTIER, FORTIFICATION, AND FORESTATION: DEFENSIVE WOODLAND ON THE SONG–LIAO BORDER IN THE LONG ELEVENTH CENTURY”. Journal of Chinese History (în engleză). 2 (2): 313–334. doi:10.1017/jch.2018.7. ISSN2059-1632.
worldcat.org
Chen, Yuan Julian (iulie 2018). „FRONTIER, FORTIFICATION, AND FORESTATION: DEFENSIVE WOODLAND ON THE SONG–LIAO BORDER IN THE LONG ELEVENTH CENTURY”. Journal of Chinese History (în engleză). 2 (2): 313–334. doi:10.1017/jch.2018.7. ISSN2059-1632.