Invariance Property in Approaching Problem on a Finite Time Interval. - Vladimir N. Ushakov; Alexander R. Matviychuk; Sergey A. Brykalov (LSSC, 2013)

Invariance Property with Application to Solving Control Problems. - Vladimir N. Ushakov; Sergey A. Brykalov; Alexander R. Matviychuk; Andrey V. Ushakov (IGTR, 2014)

α-Systems of differential inclusions and their unification. - Vladimir N. Ushakov; Sergey A. Brykalov; Grigory V. Parshikov (Autom. Remote. Control., 2016)