TY - JOUR AU - Emamizadeh, Behrouz AU - Prajapat, Jyotshana V. TI - Symmetry in rearrangement optimization problems JO - Electronic journal of differential equations PY - 2009 VL - 2009 UR - http://geodesic.mathdoc.fr/item/EJDE_2009__2009__a72/ LA - en ID - EJDE_2009__2009__a72 ER -