TY - JOUR AU - Schmidt-Mende, L; Fechtenkötter, A; Müllen, K; Moons, E; Friend, R H; MacKenzie, J D JO - Science VL - 293 PY - 2001 DO - 10.1126/science.293.5532.1119 L3 - PubMed-ID: 11498585 SP - 1119 ER -