Arndt, Daniel;Bangerth, Wolfgang;Clevenger, Thomas C.;Davydov, Denis;Fehling, Marc;Garcia-Sanchez, Daniel;Harper, Graham;Heister, Timo;Heltai, Luca;Kronbichler, Martin;Maguire Kynch, Ross;Maier, Matthias;Pelteret, Jean-Paul;Turcksin, Bruno;Wells, David.The deal.II Library, Version 9.1.Journal of Numerical Mathematics.2020.0.0