Institute of Applied Problems of Mechanics and Mathematics, National Academy of Sciences of Ukraine, Naukova 3b, 290053 Lviv, Ukraine
Bibliografia
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[2] N. N. Bautin and E. A. Leontovich, Methods and Ways of the Qualitative Analysis of Dynamical Systems in a Plane, sec. ed., Nauka, Moscow, 1990.
[3] J. S. Birman and X.-S. Lin, Knot polynomials and Vassilev's invariants, Invent. Math. 111 (1993), 225-270.
[4] D. B. A. Epstein, Curves on 2-manifolds and isotopies, Acta Math. 115 (1966), 83-107.
[5] H. A. Girik, Vector fields on two-dimensional manifolds, Ph.D. thesis, Institute of Mathematics, Kiev, 1994.
[6] K. R. Meyer, Energy functions for Morse-Smale systems, Amer. J. Math. 90 (1968), 1031-1040.
[7] J. Pallis and W. de Melo, Geometric Theory of Dynamical Systems. An Introduction, Springer, New York, 1982.
[8] M. Peixoto, On the classification of flows on two manifolds, in: Dynamical Systems, M. Peixoto (ed.), Academic Press, 1973, 389-419.
[9] M. Polyak and O. Viro, Gauss diagram formulas for Vassiliev invariants, Internat. Math. Res. Notes, 1994, N11, 445-453.
[10] C. P. Rourke and B. J. Sanderson, Introduction to the Piecewise-Linear Topology, Springer, Berlin, 1972.
[11] V. V. Sharko, Topological aspects of dynamical systems, Ukr. Math. Zh. 44 (1992), 134-142.
[12] H. Zieschang, E. Vogt and H.-D. Coldewey, Surfaces and planar discontinuous groups, Springer, Berlin, 1980.