Splinters of Recursive Functions. - Joseph S. Ullian (J. Symb. Log., 1960)

A theorem on maximal sets. - Joseph S. Ullian (Notre Dame J. Formal Log., 1961)

Ambiguity in context free languages. - Seymour Ginsburg; Joseph S. Ullian (J. ACM, 1966)

Preservation of unambiguity and inherent ambiguity in context-free languages. - Seymour Ginsburg; Joseph S. Ullian (J. ACM, 1966)

The Independence of Inherent Ambiguity From Complementedness Among Context-Free Languages. - Thomas N. Hibbard; Joseph S. Ullian (J. ACM, 1966)

Failure of a Conjecture About Context Free Languages - Joseph S. Ullian (Inf. Control., 1966)

Partial Algorithm Problems for Context Free Languages - Joseph S. Ullian (Inf. Control., 1967)

The Inherent Ambiguity Partial Algorithm Problem for Context Free Languages - Joseph S. Ullian (STOC, 1969)

Three Theorems on Abstract Families of Languages - Joseph S. Ullian (STOC, 1970)

Three Theorems Concerning Principal AFLs. - Joseph S. Ullian (J. Comput. Syst. Sci., 1971)

Meeting of the Association for Symbolic Logic: St. Louis 1972. - Carl G. Jockusch Jr.; Joseph S. Ullian; Robert B. Barrett Jr. (J. Symb. Log., 1972)

Annual Meeting of the Association for Symbolic Logic: Saint Louis, 1977. - Jon Barwise; Kenneth Kunen; Joseph S. Ullian (J. Symb. Log., 1978)