S. Iskandarov, E. A. Komartsova, “Specific asymptotic stability of solutions to a linear homogeneous Volterra integro-differential equation of the fourth order”, Vestnik Moskov. Univ. Ser. 1. Mat. Mekh., 2021, no. 1, 22–28; Moscow University Mathematics Bulletin, 76:1 (2021), 22–28
