TY - JOUR TI - The invisible frontier. A multiple species model for the origin of behavioral modernity N1 - Online resource JF - Evolutionary Anthropology: Issues, News, and Reviews AU - D'Errico, Francesco DO - 10.1002/evan.10113 PY - 2003-08-05 EP - 202 SP - 188 IS - 4 VL - 12 ER -