title: Homoclinical structures in nonautonomous systems: Nonautonomous chaos.
abstract: For general nonautonomous systems, integral sets similar to homoclinic structures of an autonomous system are introduced. A description of integral curves near such a set is given.
authors.affiliation: Research Institute of Applied Mathematics and Cybernetics 10, Ul'yanov st, Nizhny Novgorod, 603005 Russia.
authors.forename: L. M.
authors.initials: LM
authors.lastname: Lerman
authors.forename: L. P.
authors.initials: LP
authors.lastname: Shil'nikov