F. I. Bernatskiĭ, D. L. Dobrodeev, F. F. Pashchenko, “On the reduction of the cardinality of a class of distributions in the robust control of a technological plant”, Avtomat. i Telemekh., 2000, no. 6, 124–132; Autom. Remote Control, 61:6 (2000), 1003–1011
