Boundary integral formulations of eigenvalue problems for elliptic differential operators with singular interactions and their numerical approximation by boundary element methods. - Markus Holzmann; Gerhard Unger (CoRR, 2019)

Solving Maxwell's Eigenvalue Problem via Isogeometric Boundary Elements and a Contour Integral Method. - Stefan Kurz; Sebastian Schöps; Gerhard Unger; Felix Wolf 002 (CoRR, 2020)

Nanophotonic resonance modes with the nanobem toolbox. - Ulrich Hohenester; Nikita Reichelt; Gerhard Unger (Comput. Phys. Commun., 2022)