The largest small n-dimensional polytope with n+3 vertices. - Andreas Klein 001; Markus Wessler (J. Comb. Theory A, 2003)

A correction to "The largest small n-dimensional polytope with n+3 vertices": [J. Combin. Theory Ser. A 102 (2003) 401-409]. - Andreas Klein 001; Markus Wessler (J. Comb. Theory A, 2005)

Extended visual cryptography schemes. - Andreas Klein 001; Markus Wessler (Inf. Comput., 2007)