共 5 条
[1]
EDMONDS J, 1962, ANN MATH SOC B, V68, P494
[2]
Helly E., 1923, JBER DEUT MATH VEREI, V32, P175
[3]
MINIMUM-LENGTH COVERING BY INTERSECTING INTERVALS
[J].
JOURNAL OF RESEARCH OF THE NATIONAL BUREAU OF STANDARDS SECTION B-MATHEMATICAL SCIENCES,
1969, 73 (01)
:49-+
[4]
HORN WA, TO BE PUBLISHED
[5]
1963, ORE OYSTEIN GRAPHS T