Sparse grid reconstructions for Particle-In-Cell methods Fabrice Deluzet, Gwenael Fubiani, Laurent Garrigues, Clément Guillet and Jacek Narski ESAIM: M2AN, 56 5 (2022) 1809-1841 Published online: 08 August 2022 DOI: 10.1051/m2an/2022055