Sadaki Hirose, Masakazu Nasu Left Universal Context-Free Grammars and homomorphic Characterizations of Languages [Citation Graph (0, 0)][DBLP] Information and Control, 1981, v:50, n:2, pp:110-118 [Journal]
Tor Helleseth A Characterization of Codes Meeting the Griesmer Bound [Citation Graph (0, 0)][DBLP] Information and Control, 1981, v:50, n:2, pp:128-159 [Journal]