Introduction to the qualitative theory of dynamical systems on surfaces /
Aranson, S. Kh.
Belit︠s︡kiĭ, Genrikh Ruvimovich.
Zhuzhoma, E. V.
American Mathematical Society.
Providence, R.I. : American Mathematical Society,
c1996.
Includes bibliographical references (p. 321-325).
Flows (Differentiable dynamical systems)