%0 Journal Article %A A. P. Kuznetsov %A S. P. Kuznetsov %A N. V. Stankevich %T Four-dimensional system with torus attractor birth via saddle-node bifurcation of limit cycles in context of family of blue sky catastrophes %J Izvestiya VUZ. Applied Nonlinear Dynamics %D 2015 %P 32-39 %V 23 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/IVP_2015_23_4_a2/ %G en %F IVP_2015_23_4_a2