- Mikhail S. Nikolskii, “On solvability of systems of integral equations in convolutions”, Integral Transforms and Special Functions, 3, no. 1, 1995,
37 
- L. N. Luk’yanova, “Controllability Problem for a Linear System with a Convex Phase Constraint”, Comput Math Model, 25, no. 2, 2014,
270