TY - JOUR AU - Max Lieblich TI - The period-index problem for fields of transcendence degree $2$ JO - Annals of mathematics PY - 2015 SP - 391 EP - 427 VL - 182 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4007/annals.2015.182.2.1/ DO - 10.4007/annals.2015.182.2.1 LA - en ID - 10_4007_annals_2015_182_2_1 ER -