Nasibzadeh Vusala N., Guliyev Hamlet F. «Reduction of the acoustic inverse problem to an optimal control problem and its investigation» // Tomsk State University Journal of Mathematics and Mechanics 2018. №54 C.5-16
Rahimov Anar B. «On an approach to solution to optimal control problems on the classes ofpiecewise constant, piecewise linear, and piecewise given functions» // 2012. №2(19) C.20-30