TY - BOOK AU - Gaeta Giuseppe Et Al TI - Symmetry and Perturbation Theory - Proceedings of the International Conference on Spt2007 SN - 9789812776174 PB - World Scientific KW - Nonlinear Science, Chaos & Dynamical Systems UR - https://www.worldscientific.com/worldscibooks/10.1142/6650#t=toc ER -