M. Muniz, M. Ehrhardt and M. Günther, "Approximating Correlation Matrices Using Stochastic Lie Group Methods", Mathematics, vol. 9, no. 1, pp. 94, Jan. 2021. MDPI AG.

K. K. Sabirov, J. R. Yusupov, M. M. Aripov, M. Ehrhardt and D. U. Matrasulov, "Reflectionless propagation of {Manakov} solitons on a line: A model based on the concept of transparent boundary conditions", Phys. Rev. E, vol. 103, no. 4, pp. 043305, 2021. APS.

J. Kühn, A. Bartel and P. Putek, "A Hysteresis Loss Model for Tellinen’s Scalar Hysteresis Model" in Scientific Computing in Electrical Engineering: SCEE 2020, Eindhoven, The Netherlands, February 2020, Springer International Publishing Cham, 2021, pp. 241--250.

M. Bannenberg, A. Ciccazzo and M. Günther, "Reduced order multirate schemes for coupled differential-algebraic systems", Applied Numerical Mathematics, vol. 168, pp. 104--114, 2021. North-Holland.

N. Umeorah, P. Mashele and M. Ehrhardt, "Pricing basket default swaps using quasi-analytic techniques", Decisions in Economics and Finance, vol. 44, pp. 241--267, 2021. Springer International Publishing.