共 6 条
[1]
BREEN M, UNPUBLISHED
[2]
KRASNOSELSKII MA, 1946, MAT SBORNIK, V19, P309
[3]
Nadler S.B., 1978, HYPERSPACES SETS
[4]
TIETZE H, 1928, MATH Z, V29, P697
[5]
Valentine F. A., 1964, CONVEX SETS