Application of the Lyapunov-Schmidt method to the problem of the branching of a cycle from a family of equilibria in a system with multicosymmetry. Kurakin, L.G.; Yudovich, V.I. — 2000 Sibirskij Matematicheskij Zhurnal
On equilibrium bifurcations in the cosymmetry collapse of a dynamical system. Kurakin, L.G.; Yudovich, V.I. — 2004 Sibirskij Matematicheskij Zhurnal