EN中文
Evolutionary characteristics of science and technology cooperation network of Beijing-Tianjin-Hebei region and its influencing factors
XI Qiangmin, LI Guoping, SUN Yukang, LYU Shuang
Acta Geographica Sinica . 2022, (6): 1359 -1373 .  DOI: 10.11821/dlxb202206005