共 24 条
[2]
BERKOWITZ J, 1959, COMM PURE APPL MATH, V12, P513
[3]
Birman M. Sh., 1961, MAT SBORNIK, V55, P125
[4]
Coddington E. A., 1955, THEORY ORDINARY DIFF
[5]
Dunford N., 1963, PURE APPL MATH, VVII