The deal.II library, Version 9.4. - Daniel Arndt 003; Wolfgang Bangerth; Marco Feder; Marc Fehling; Rene Gassmöller; Timo Heister; Luca Heltai; Martin Kronbichler 002; Matthias Maier; Peter Munch; Jean-Paul Pelteret; Simon Sticko; et al. (J. Num. Math., 2022)

The deal.II Library, Version 9.5. - Daniel Arndt 003; Wolfgang Bangerth; Maximilian Bergbauer; Marco Feder; Marc Fehling; Johannes Heinz; Timo Heister; Luca Heltai; Martin Kronbichler 002; Matthias Maier; Peter Munch; Jean-Paul Pelteret; et al. (J. Num. Math., 2023)

A comparison of non-matching techniques for the finite element approximation of interface problems. - Daniele Boffi; Andrea Cangiani; Marco Feder; Lucia Gastaldi; Luca Heltai (Comput. Math. Appl., 2023)

Matrix-free implementation of the non-nested multigrid method. - Marco Feder; Luca Heltai; Martin Kronbichler 002; Peter Munch (CoRR, 2024)

R3MG: R-tree based agglomeration of polytopal grids with applications to multilevel methods. - Marco Feder; Andrea Cangiani; Luca Heltai (J. Comput. Phys., 2025)

Optimal and Scalable Augmented Lagrangian preconditioners for Fictitious Domain problems. - Michele Benzi; Marco Feder; Luca Heltai; Federica Mugnaioni (CoRR, 2025)