%0 Journal Article %A C. A. Naligama %A O. B. Tsekhan %T Asymptotic approximations validity boundaries for decoupling transformation of three-time-scale linear time-invariant singularly perturbed systems with delay %J Problemy fiziki, matematiki i tehniki %D 2022 %P 83-93 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/PFMT_2022_2_a13/ %G en %F PFMT_2022_2_a13