| Type | Title | Author | Publisher | Year |
| Article | On sparse oracles separating feasible complexity classes | Hartmanis, J., Hemachandra, L. | | |
| Article | What Makes Some Language Theory Problems Undecidable | Hartmanis, J., Hopcroft, J.E. | | 1970 |
| Article | Languages simultaneously complete for one-way and two-way log-tape automata | Hartmanis, J., Mahaney, S. | | 1981 |
| Article | On isomorphisms and density of NP and other complete sets | Hartmanis, J.,Berman, L. | | 1975 |
| Article | Recognizable closures and submonoids of free partially commutative monoids | Hashiguchi, K. | | 1991 |
| Article | Recognizable closures and submonoids of free partially commutative monoids | Hashiguchi, K. | | 1991 |
| Article | A Note on One-Sided Context-Sensitive Grammars | Havel, I. | | 1969 |
| Article | Expanded Subalphabets in the Theories of Languages and Semigroups | Head, T. | | 1982 |
| Article | The topological structures of adherences of regular languages | Head, T. | | 1986 |
| Article | Splicing schemes and DNA | Head, T. | | 1992 |
| Article | Fixed Languages and the Adult Languages of 0L Schemes | Head, T. | | 1981 |
| Article | Unique decipherability relative to a language | Head, T. | | 1980 |
| Article | A-transducers and the monotonicity of IL schemes | Head, T. | | 1980 |
| Article | Codes, languages, 0L schemes and a-transducers | Head, T. | | 1979 |
| Article | Adherences of D0L languages | Head, T. | | 1984 |
| Article | Expanded subalphabets in the theories of languages and semigroups | Head, T. | | 1982 |
| Article | A-Transducers and the Monotonicity of IL Schemes | Head, T. | | 1980 |
| Article | Adherence equivalence is decidable for D0L languages | Head, T. | | 1984 |
| Article | Formal language theory and DNA: an analysis of the generative capacity of specific recombinant behaviors | Head, T. | | 1987 |
| Article | Fixed Languages and the Adult Languages of 0L Schemes | Head, T. | | 1981 |
| Article | Expanded Subalphabets in the Theories of Languages and Semigroups | Head, T. | | 1982 |
| Article | Codeterministic Lindenmayer Schemes and Systems | Head, T. | | 1979 |
| Article | Codeterministic Lindenmayer Schemes and Systems | Head, T. | | 1979 |
| Article | Hypercodes in Deterministic and Slender 0L languages | Head, T., Thierrin, G. | | 1980 |
| Article | D0L schemes and the periodicity of string embeddings | Head, T., Thierrin, G., Wilkinson, J. | | 1983 |
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