TY - JOUR AU - Lewis, J. E. TI - A Banach Space Whose Elements are Classes of Sets of Constant Width JO - Canadian mathematical bulletin PY - 1975 SP - 679 EP - 689 VL - 18 IS - 5 UR - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1975-119-6/ DO - 10.4153/CMB-1975-119-6 ID - 10_4153_CMB_1975_119_6 ER -