共 20 条
[1]
Diliberto S. P., 1961, REND CIR MAT PALER 2, V10, P111
[2]
FENICHEL N, 1971, INDIANA U MATH J, V21, P193
[5]
Hadamard J., 1901, B SOC MATH FR, V29, P224, DOI [10.24033/bsmf.674, DOI 10.24033/BSMF.674]
[7]
HIRSCH M, UNPUBLISHED
[8]
KUPKA I, 1964, CR HEBD ACAD SCI, V258, P4197
[9]
KURZWEIL J, 1967, INVARIANT MANIFOLDS, P431