TY - JOUR AU - R. Brooks TI - Cheng's theorem in $L^p$ spectral geometry JO - Algebra i analiz PY - 1996 SP - 98 EP - 102 VL - 8 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/AA_1996_8_2_a2/ LA - en ID - AA_1996_8_2_a2 ER -