TY - BOOK AU - Arnold V I AU - Afrajmovich V S AU - Il'yashenko Yu S AU - Shil'nikov L P TI - Bifurcation theory and catastrophe theory SN - 3-540-65379-1 U1 - 515.35 PY - 1999/// CY - Berlin PB - Springer-Verlag KW - Bifurcation theory KW - Catastrophe theory ER -