V. Derkach, D. Strelnikov, H. Winkler.

*On a class of integral systems*, to appear.L. Pestov, D. Strelnikov. Approximate boundary controllability of wave equation with mixed boundary conditions and sound-speed reconstruction, 2019 Days on Diffraction (DD), pp. 144-147.

D. Strelnikov. Boundary triples for integral systems on the half-line, Methods of Functional Analysis and Topology, 25 (2019), no. 1, pp. 84-96.

L. Pestov, D. Strelnikov. Approximate controllability of the wave equation with mixed boundary conditions, Journal of Mathematical Sciences, 239 (2019), no. 2, pp. 75-85.

D. Strelnikov. Boundary triples for integral systems, Reports of the National Academy of Sciences of Ukraine, 7 (2018), pp. 3-9.

D. Strelnikov. Boundary triples for integral systems on finite intervals, Journal of Mathematical Sciences, 231 (2018), no. 1, pp. 83-100.

**2019-now***Simulation based optimization of the time-dependent pulse power for laser beam welding of aluminum alloys in order to avoid hot cracks.*Technische Universität Chemnitz, Technische Universität Ilmenau.**2018-2019***Properties of singular solutions of differential equations, spectral analysis of difference systems and modeling of nonlinear processes.*Vasyl Stus’ Donetsk National University, Vinnytsya.**2017-2018***Modeling, analysis, and approximation theory toward applications in tomography and inverse problems.*Volkswagen Foundation, Berlin/Lübeck/Braunschweig.**2016-2018***Mathematical Models for Bio-Medical Problems.*Scientific and technical joint project of Ministry of Education, Ukraine and BMBF, Germany.**2016-2019***Direct and inverse spectral problems for differential and difference operators.*National Pedagogical Dragomanov University, Kyiv.

D. Strelnikov joint with V. Derkach and L. Pestov.

*Recovering a sound speed in the wave equation from a partial data.*Modeling, analysis, and approximation theory toward applications in tomography and inverse problems, 3-7 February 2018, Braunschweig Technical University.D. Strelnikov.

*Spectral functions for Sturm-Liouville type integral systems on finite intervals.*Workshop on Modeling, analysis, and approximation theory toward applications in tomography and inverse problems", 21-22 August 2018, Humbolt University of Berlin.D. Strelnikov.

*Integral systems with measures.*Siegmundsburg Workshop SS 2018, 24-25 September 2018, Ilmenau Technical University.D. Strelnikov.

*Boundary Triples for Integral Systems on a Half-line.*International Conference in Functional Analysis dedicated to the 125th anniversary of Stefan Banach, 18-23 September 2017, Lviv, Ukraine.

- VW summer school “Modeling, Analysis, and Approximation Theory toward applications in tomography and inverse problems”, 31 July - 4 August 2017, Lübeck.