TY - Journal of Geographical Sciences A1 - DUAN Xuejun, YU Xiaogan, Josef Nipper T1 - Economic polarized trends, function and expanded boundaries of the Yangtze Delta Region Y1 - 2009-12-25 00:00:00.0 JF - Journal of Geographical Sciences JO - Journal of Geographical Sciences SP - 733 EP - 749 VL - 19 IS - 6 UR - {https://www.geogsci.com/EN/10.1007/s11442-009-0733-5} N1 - 10.1007/s11442-009-0733-5 ER -