Eliahu Shamir A Representation Theorem for Algebraic and Context-Free Power Series in Noncommuting Variables [Citation Graph (0, 0)][DBLP] Information and Control, 1967, v:11, n:1/2, pp:239-254 [Journal]
Eliahu Shamir Some Inherently Ambiguous Context-Free Languages [Citation Graph (0, 0)][DBLP] Information and Control, 1971, v:18, n:4, pp:355-363 [Journal]