ELEMENTS OF CRITICAL POINTS THEORY FOR (3+1)-DIMENSIONAL TOPOLOGICAL SOLITONS: STRUCTURE OF TORONS IN THE FADDEEV MODEL СтатьяRybakov Yurii P., Sanyuk Valerii I.Nonlinear evolution equations & dynamical systems: NEEDS '94 (Los Alamos, NM). 1995. С. 197-207
EXISTENCE AND CONTINUITY OF AN IMPLICIT FUNCTION IN A NEIGHBORHOOD OF AN ABNORMAL POINT СтатьяZhukovskiĭ S.E., Mingaleeva Z.T.Вестник Московского университета. Серия 15: Вычислительная математика и кибернетика.