Isomorphism Classes and Derived Series of Certain Almost-Free Groups. - Robert H. Lewis; Sal Liriano (Exp. Math., 1994)

Irreducible Components in an Algebraic Variety of Representations of a Class of One Relator Groups. - Sal Liriano (Int. J. Algebra Comput., 1999)

Algebraic Geometric Invariants of Parafree Groups. - Sal Liriano (Int. J. Algebra Comput., 2007)