中国科学院数学与系统科学研究院期刊网
ε-subdifferential of the Minimal Time Function in Normed Vector Space
Shu Qin SUN, Yi Ran HE, Jun LIU
Acta Mathematica Sinica, Chinese Series . 2018, (3): 485 -496 .  DOI: 10.12386/A2018sxxb0042