共 18 条
[1]
BECKENBACH EF, 1961, ERGEBNISSE MATHEMATI, V30
[2]
COPPEL WA, 1971, LECTURE NOTES MATH, V220
[3]
Hanan M., 1961, PAC J MATH, V11, P919
[5]
HOWARD H, 1960, T AM MATH SOC, V96, P296
[7]
Kondrat'ev V.A., 1961, T MOSK MAT OVA, V10, P419
[8]
Leighton W., 1958, T AM MATH SOC, V89, P325, DOI [10.1090/S0002-9947-1958-0102639-X, DOI 10.1090/S0002-9947-1958-0102639-X]
[9]
Levin A.Y., 1969, RUSSIAN MATH SURVEYS, V24, P43, DOI DOI 10.1070/RM1969V024N02ABEH001342
[10]
Levin A.Y., 1963, SOV MATH DOKL, V4, P121