LinearOperator - A generic, high-level expression syntax for linear algebra. - Matthias Maier; Mauro Bardelloni; Luca Heltai (Comput. Math. Appl., 2016)

deal2lkit: A toolkit library for high performance programming in deal.II. - Alberto Sartori; Nicola Giuliani; Mauro Bardelloni; Luca Heltai (SoftwareX, 2018)