共 14 条
[1]
Aronson D.G., 1959, ILLINOIS J MATH, V3, P580
[6]
Hartman P., 2010, CLASSICS APPL MATH, V38
[7]
Kifer J I, 1974, MATH USSR IZV, V8, P1083
[8]
KIFER YI, 1976, THEOR PROBAB APPL+, V21, P513
[9]
Krasnoselskii M.A., 1964, POSITIVE SOLUTIONS O
[10]
ROBINSON C, 1977, ROCKY MT J MATH, V7, P425