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If you are having any problems with accessing any of my papers, let me know and I will help you.

E. Jarlebring, M. Fasi, E. Ringh, Computational graphs for matrix functions, ACM Trans. Math. Softw. 48:4, Article 39 (2022), 35 pages. (Open access)
Here is the documentation, and the code is on Github as matrixfunctions/GraphMatFun.jl.
E. Ringh, and E. Jarlebring, Nonlinearizing two-parameter eigenvalue problems, SIAM J. Matrix Anal. Appl., 42:2 (2021), 775-799. (Open access)
Code for the problem: E. Jarlebring's homepage.
T. Breiten and E. Ringh, Residual-based iterations for the generalized Lyapunov equation, BIT, 59:4 (2019), pages 823-852. (Open access)
Code for the problem: Here.
E. Jarlebring, G. Mele, D. Palitta, and E. Ringh, Krylov methods for low-rank commuting generalized Sylvester equations, Numer. Linear Algebra Appl., 25 (2018), pages e2176.
Code for the problem: Here, and at D. Palitta's homepage.
E. Ringh, G. Mele, J. Karlsson, and E. Jarlebring, Sylvester-based preconditioning for the waveguide eigenvalue problem, Linear Algebra Appl., 542 (2018), pages 441-463.
Code for the problem: Here.

A. Gattami, E. Ringh, and J. Karlsson, Time Localization and Capacity of Faster-Than-Nyquist Signaling, IEEE Global Communications Conference (GLOBECOM), San Diego, California, USA Dec. 2015.
M. Larsson, J. Lindberg, J. Lycke, K. Hansson, A. Khakulov, E. Ringh, F. Svensson, I. Tjernberg, A. Alam, J. Araujo, F. Farokhi, E. Gadhimi, A. Teixeira, D. V. Dimarogonas and K. H. Johansson, Toward an Indoor Testbed for Mobile Networked Control Systems, Proceedings of the First Workshop on Research, Development and Education on Unmanned Aerial Systems (RED-UAS), Seville, Spain 2011.

G. Mele, E. Ringh, D. Ek, F. Izzo, P. Upadhyaya, E. Jarlebirng, Preconditioning for linear systems, Kindle direct publishing, 2020. (purchase book)

E. Jarlebring, M. Bennedich, G. Mele, E. Ringh, and P. Upadhyaya, NEP-PACK: A Julia package for nonlinear eigenproblems - v0.2, arXiv, (2018), 1811.09592.
Here is the documentation, and the code is on Github as nep-pack/NonlinearEigenproblems.jl.
A. Gattami, E. Ringh, and J. Karlsson, Time Localization and Capacity of Faster-Than-Nyquist Signaling, arXiv, (2015), 1505.03309.

Core developer of GraphMatFun.jl, a software package in Julia for representation, manipulation and optimization of algorithms for matrix functions. For more info see the documentation, and/or the pre-print.
Core developer of NEP-PACK, a software package for nonlinear eigenvalue problems in Julia. For more info see the documentation for NEP-PACK, and/or the pre-print.