BaryakhtarV. G., BerezanskyY. M., KorolyukV. S., MarchenkoV. O., MitropolskiyY. A., SamoilenkoA. M., and KhruslovE. Y. “Leonіd Andrіyovich Pastur (on His 70th Birthday)”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 59, no. 12, Dec. 2007, pp. 1699-00, https://umj.imath.kiev.ua/index.php/umj/article/view/3423.