1. S. Matsumoto and A. Sato, ?Perturbation of the Hopf flow and transverse foliations,?Nagoya Math. J.,122, 75?82 (1991).
2. R. V. Plykin, ?On the geometry of hyperbolic attractors of smooth cascades,?Usp. Mat. Nauk,39, No. 4, 75?113 (1984).
3. M. K. Sparavalo, ?Method for the purposeful formation of the local topological structures of one-codimensional foliations for dynamical systems with control,?Avtomatika, No. 5, 70?76 (1992).
4. M. K. Sparavalo, ?Stratification of diffeomorphisms with lattices on 0-levels and their application in the theory of dynamical systems,?Mekh. Giroskop. System,10, 103?105 (1991).