  We investigate electronic band-structure images in reciprocal space of few
layer graphene epitaxially grown on SiC(000-1). In addition to the observation
of commensurate rotation angles of the graphene layers, the k-space images
recorded near the Fermi edge highlight structures originating from diffraction
of the Dirac cones due to the relative rotation of adjacent layers. The
21.9{\deg} and 27{\deg} rotation angles between two sheets of graphene are
responsible for a periodic pattern that can be described with a superlattice
unit cells. The superlattice generates replicas of Dirac cones with smaller
wave vectors, due to a Brillouin zone folding.
