中国科学院数学与系统科学研究院期刊网
AMS
Isometric Extension Problem Between Strictly Convex Two-dimensional Normed Spaces
Guang Gui DING, Jian Ze LI
Acta Mathematica Sinica . 2019, (4): 513 -518 .  DOI: 10.1007/s10114-019-7509-3