共 8 条
[1]
Hartman P., 2002, CLASSICS APPL MATH
[3]
JONES RA, 1973, THESIS U TENNESSEE
[4]
Levin A. Ju., 1960, SOV MATH DOKL, V1, P1313
[5]
LEVIN AI, 1960, DOKL AKAD NAUK SSSR+, V135, P783
[6]
STAFFORD RA, 1974, THESIS U TENNESSEE
[7]
Sturm C., 1836, J MATH PURE APPL, V1, P106