TY - JOUR AU - H. Alexander AU - John Wermer TI - Linking numbers and boundaries of varieties JO - Annals of mathematics PY - 2000 VL - 151 IS - 1 UR - http://geodesic.mathdoc.fr/articles/10.2307/121114/ DO - 10.2307/121114 ID - 10_2307_121114 ER -