Dd. Bainov et Mb. Dimitrova, QUICKLY OSCILLATING SOLUTIONS OF OPERATOR-DIFFERENTIAL EQUATIONS, Applied mathematics and computation, 75(1), 1996, pp. 1-11
In the present paper sufficient conditions are obtained under which th
e bounded quickly oscillating solutions of a class of operator-differe
ntial equations tend to zero as t --> infinity, and also some asymptot
ic properties of their solutions are investigated.