Marcella Anselmo The Zig-Zag Power Series: A Two-Way Version of the * Operator. [Citation Graph (0, 0)][DBLP] Theor. Comput. Sci., 1991, v:79, n:1, pp:3-24 [Journal]
Daniel Krob Some Examples of Formal Series Used in Non-Commutative Algebra. [Citation Graph (0, 0)][DBLP] Theor. Comput. Sci., 1991, v:79, n:1, pp:111-135 [Journal]
Werner Kuich Automata and Languages Generalized to omega-Continuous Semirings. [Citation Graph (0, 0)][DBLP] Theor. Comput. Sci., 1991, v:79, n:1, pp:137-150 [Journal]
N. E. Oussous Computation, on Macsyma, of the Minimal Differential Representation of Noncommutative Polynomials. [Citation Graph (0, 0)][DBLP] Theor. Comput. Sci., 1991, v:79, n:1, pp:195-207 [Journal]