Author,Title,Edition,Publisher,Year,Series,Number,ISBN,ISSN,URL
"Leonov, Gennadij A and Burkin, I. M. (Igorʹ Mikhaĭlovich) and Shepeli︠a︡vyĭ, A. I. (Aleksandr Ivanovich)",Frequency methods in oscillation theory,,Kluwer Academic Publishers,1996,Mathematics and its applications,,0792338960,,https://cir.nii.ac.jp/crid/1130282271199011200