共 3 条
[1]
Kreiss Heinz-Otto, 1962, BIT, V2, P153, DOI DOI 10.1007/BF01957330
[2]
MILLER J, 1966, MATH SCAND, V18, P113
[3]
MORTON KW, 1965, COMM PURE APPL MATH, V17, P375