共 9 条
[4]
DITZIAN Z, 1985, ACTA SCI MATH, V48, P103
[5]
Ditzian Z., 1987, MODULI SMOOTHNESS
[6]
Durrmeyer J., 1967, THESIS FS U PARIS
[7]
IVANOV K, IN PRESS J APPROX TH
[8]
IVANOV KG, 1982, SERDICA, V8, P262