共 11 条
[1]
AMBARTSUMYAN VA, 1958, THEORETICAL ASTROPHY
[2]
ATKINSON FV, 1955, PAC J MATH, V5, P643
[3]
Bellman R., 1953, STABILITY THEORY DIF
[4]
Coddington E. A., 1955, THEORY ORDINARY DIFF
[5]
HEIDEL JW, TO BE PUBLISHED
[7]
Kiguradze I. T., 1963, SOOBSHCH AKAD NAUK G, V30, P129
[8]
KURZWEIL J, 1960, CASOPIS PEST MAT, P357
[9]
Nehari Z., 1957, T AM MATH SOC, V85, P428