A Direct Projection to Low-Order Level for p-Multigrid Methods in Isogeometric Analysis. - Roel Tielen; Matthias Möller; Kees Vuik (ENUMATH, 2019)

Towards Accuracy and Scalability: Combining Isogeometric Analysis with Deflation to Obtain Scalable Convergence for the Helmholtz Equation. - Vandana Dwarka; Roel Tielen; Matthias Möller; Kees Vuik (CoRR, 2020)

Combining p-multigrid and multigrid reduced in time methods to obtain a scalable solver for Isogeometric Analysis. - Roel Tielen; Matthias Möller; Cornelis Vuik (CoRR, 2021)