Information Rates and Weights of Codes in Structural Matrix Rings. - Andrei V. Kelarev; Olga Sokratova (AAECC, 2001)

Linear Automata and Recognizable Subsets in Free Semirings. - Olga Sokratova (FCT, 2001)

Languages Recognized by a Class of Finite Automata. - Andrei V. Kelarev; Olga Sokratova (Acta Cybern., 2001)

Directed Graphs and Syntactic Algebras of Tree Languages. - Andrei V. Kelarev; Olga Sokratova (J. Autom. Lang. Comb., 2001)

The Mal'cev Lemma and rewriting on semirings. - Olga Sokratova (Theor. Comput. Sci., 2001)

Two Algorithms for Languages Recognized by Graph Algebras. - Andrei V. Kelarev; Olga Sokratova (Int. J. Comput. Math., 2002)

On congruences of automata defined by directed graphs. - Andrei V. Kelarev; Olga Sokratova (Theor. Comput. Sci., 2003)

Reduction relations for monoid semirings. - Friedrich Otto; Olga Sokratova (J. Symb. Comput., 2004)