BULLETIN MATHEMATIQUE DE LA SOCIETE DES SCIENCES MATHEMATIQUES DE ROUMANIE, cilt.57, sa.2, ss.181-192, 2014 (SCI-Expanded)
After studying the existence of the unique solution x (t) of initial value problem (1.1) (1.3), we prove that the limit of x (t) is a real constant as t -> infinity. Also, we formulate this limit value in terms of the initial condition (1.3) and the solution of the integral equation (2.3).