TY - PROGRESS IN GEOGRAPHY A1 - Qiong SONG, Xinzheng ZHAO, Tongsheng LI, Jingyu LIU T1 - Spatial structures and influencing factors of multiple urban networks based on the perspective of directed-multivalued relation Y1 - 2018-09-28 09:23:25.11 JF - PROGRESS IN GEOGRAPHY JO - PROGRESS IN GEOGRAPHY SP - 1257 EP - 1267 VL - 37 IS - 9 UR - {https://www.progressingeography.com/EN/10.18306/dlkxjz.2018.09.008} N1 - 10.18306/dlkxjz.2018.09.008 ER -