共 19 条
[1]
Bajpai S.K., 1977, Rev. Roum. Math. Pures Appl, V22, P295
[4]
EENIGENBURG P, 1984, REV ROUM MATH PURE A, V29, P567
[5]
Eenigenburg P., 1983, INT SERIES NUMERICAL, V64, P339
[6]
Goel R.M., 1981, Glas. Mat. Ser. III, V17, P19
[8]
Libera R.J., 1961, Michigan Math. J, V8, P167, DOI [10.1307/mmj/1028998568, DOI 10.1307/MMJ/1028998568]
[9]
Liu J.-L., 2002, J NATUR GEOM, V21, P81