TY - JOUR AU - Ojea, Ignacio TI - Optimal a priori error estimates in weighted Sobolev spaces for the Poisson problem with singular sources JO - ESAIM: Mathematical Modelling and Numerical Analysis PY - 2021 SP - S879 EP - S907 VL - 55 IS - Supplément PB - EDP-Sciences UR - https://www.numdam.org/articles/10.1051/m2an/2020065/ DO - 10.1051/m2an/2020065 LA - en ID - M2AN_2021__55_S1_S879_0 ER -