A CASE STUDY ON HBO (HUHHOT, BAOTOU, ORDOS) CITY GROUP: ECONOMIC CONNECTION NETWORK FEATURES AND EVOLUTION OF RESOURCE-BASED CITIES 
CUI Xinlei, ZHAO Yanxia
Resources & Industries . 2018, (5): 1 -8 .  DOI: 10.13776/j.cnki.resourcesindustries.20180704.001