Viliam Geffert A Representation of Recursively Enumerable Languages by Two Homomorphisms and a Quotient. [Citation Graph (0, 0)][DBLP] Theor. Comput. Sci., 1988, v:62, n:3, pp:235-249 [Journal]
Christoph Meinel The Power of Nondeterminism in Polynomial-Size Bounded-Width Branching Programs. [Citation Graph (0, 0)][DBLP] Theor. Comput. Sci., 1988, v:62, n:3, pp:319-325 [Journal]