Computing Activities at the Spanish Tier-1 and Tier-2s for the ATLAS experiment in the LHC Run 3 period and towards High Luminosity (HL-LHC) - Gonzalez de la Hoz, Santiago; Acin, Vanesa; Accion, Esther; Acosta-Silva, Carles; Aparisi, Javier; Collado Soto, Pablo; del Peso, Jose; Fernandez Casani, Alvaro; Flix, Jose; Garcia Montoro, Carlos; Merino, Gonzalo; Pacheco Pages, Andreu; et al. (EPJ Web of Conferences, 2024)