共 4 条
[2]
LEBOVITZ NR, 1975, STUD APPL MATH, V54, P229
[3]
SELGRADE JF, 1984, J MATH BIOL, V19, P133, DOI 10.1007/BF00275936
[4]
Stoker J.J., 1950, NONLINEAR VIBRATIONS, V2