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

Finite section method for aperiodic Schrödinger operators. - Fabian Gabel; Dennis Gallaun; Julian Großmann; Riko Ukena (CoRR, 2021)

Finite Sections of Periodic Schrödinger Operators. - Fabian Gabel; Dennis Gallaun; Julian Großmann; Marko Lindner; Riko Ukena (CoRR, 2021)