TY - JOUR AU - Alexander A. Razborov TI - A product theorem in free groups JO - Annals of mathematics PY - 2014 SP - 405 EP - 429 VL - 179 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4007/annals.2014.179.2.1/ DO - 10.4007/annals.2014.179.2.1 LA - en ID - 10_4007_annals_2014_179_2_1 ER -