Algebraic mthods in nonlinear perturbation theory
Bogaevski, V
Algebraic mthods in nonlinear perturbation theory - New York Springer Verlag 1991 - Applied mathematical sciences .
0381974911
Perturbation theory
Algebraic mthods in nonlinear perturbation theory - New York Springer Verlag 1991 - Applied mathematical sciences .
0381974911
Perturbation theory