This publication is cited in the following articles:
A. I. Bulgakov, O. V. Filippova, “Impulsnye funktsionalno-differentsialnye vklyucheniya s otobrazheniem, ne obladayuschim svoistvom vypuklosti po pereklyucheniyu znachenii”, Izv. IMI UdGU, 2014, no. 1(43), 3–48