Sufficient Criteria and Sharp Geometric Conditions for Observability in Banach Spaces. - Dennis Gallaun; Christian Seifert; Martin Tautenhahn (SIAM J. Control. Optim., 2020)

Observability for Non-autonomous Systems. - Clemens Bombach; Fabian Gabel; Christian Seifert; Martin Tautenhahn (SIAM J. Control. Optim., 2023)

Optimal Control of Parabolic Equations - A Spectral Calculus Based Approach. - Luka Grubisic; Martin Lazar; Ivica Nakic; Martin Tautenhahn (SIAM J. Control. Optim., 2023)