Sd. Furta, ON ASYMPTOTIC SOLUTIONS OF SYSTEMS OF DIFFERENTIAL-EQUATIONS WITH DEVIATING ARGUMENT IN CERTAIN CRITICAL CASES, Sbornik. Mathematics, 78(1), 1994, pp. 175-186
Sufficient conditions are found for the existence of particular soluti
ons of the system x(t) = f(x(t), x(t + t1) ,..., x(t + t(k))), x is-an
-element-of R(n), that converge to the critical point x = 0 as t --> infinity or as t --> -infinity, but not exponentially.