[1] F. S. De Blasi:
On the differentiability of multifunctions. Pacif. J. Math. 66 (1976), 67-81.
MR 0445534 |
Zbl 0348.58004
[2] M. Boudourides J. Schinas:
The mean value theorem for multifunctions. Bull. Math. Roumanie 25 (1981), no 2, 129-141.
MR 0636833
[3] M. Boudorides J. Schinas:
Higher order differentiability of multifunctions. Nonlin. Anal. 5 (1981), no 5, 509-516.
MR 0613059
[4] P. Kranz:
A metrizable cancellative semigroup without translation invariant metric. Proc. Amer. Math. Soc. 66 (1977), no 1, 17-19.
MR 0450452 |
Zbl 0367.22003