TY - Acta mathematica scientia,Series B A1 - Guanlong BAO, Hasi WULAN T1 - $Q_K$ SPACES: A BRIEF AND SELECTIVE SURVEY Y1 - 2021-12-25 JF - Acta mathematica scientia, Series B JO - Acta mathematica scientia,Series B SP - 2039 EP - 2054 VL - 41 IS - 6 UR - http://121.43.60.238/sxwlxbB N1 - 10.1007/s10473-021-0615-1 ER -