TY - JOUR AU - Gee, Toby AU - Taïbi, Olivier TI - Arthur’s multiplicity formula for ${\protect \bf GSp}_4$ and restriction to ${\protect \bf Sp}_4$ JO - Journal de l’École polytechnique — Mathématiques PY - 2019 SP - 469 EP - 535 VL - 6 PB - Ecole polytechnique UR - http://www.numdam.org/articles/10.5802/jep.99/ DO - 10.5802/jep.99 LA - en ID - JEP_2019__6__469_0 ER -