TY - JOUR AU - Karl Michael Schmidt TI - On the essential spectrum of Dirac operators with spherically symmetric potentials. JO - Mathematische Annalen PY - 1993 SP - 117 EP - 132 VL - 297 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MAN_1993__297_3_165121/ ID - MAN_1993__297_3_165121 ER -