| Type | Title | Author | Publisher | Year |
| Article | Pushdown Automata with Reversal-Bounded Counters | Chan, T.-H. | | 1988 |
| Article | Pushdown Automaton with two Stacks as a Parsing Device | Kopriva, J. | | 1968 |
| Article | Pushdown acceptor forms | Ginsburg, S., Spanier, E.H. | | 1977 |
| Article | Pushdown machines for the macro tree transducer | Engelfriet, J., Vogler, H. | | 1986 |
| Article | Pyramids: a data type for matrix representation in pascal | Solntseff, N., Wood, D. | | 1977 |
| Article | Quotients and plane trees of group labeled 2-structures | Ehrenfeucht, A., Harju, T., Rozenberg, G. | | 1994 |
| Article | Quotients of Context-Free Languages | Ginsburg, S., Spanier, E.H. | | 1963 |
| Article | Random Context Languages | van der Walt, A. | | 1971 |
| Article | Random Context in Regulated Rewriting Versus Cooperating Distributed Grammar Systems | Bordihn, H., Holzer, M. | | |
| Article | Random Grammars | Malyshev, V. | | 1997 |
| Article | Random context languages | van der Walt, A.P.J. | | 1972 |
| Article | Random context languages | van der Walt, A.P.J. | | 1972 |
| Article | Rational algebraic theories and fixed-point solutions | Wright, J.B., Thatcher, J.W., Wagner, E.G. | | 1976 |
| Article | Rational algebraic theories and fixed-point solutions (extended abstract) | Wright, J.B., Goguen, J.A., Thatcher, J.W., Wagner, E.G. | | 1976 |
| Article | Real-time, pseudo real-time, and linear-time ITA | Culik II, K., Yu, S. | | 1986 |
| Article | Real-time, pseudo real-time, and linear-time ITA | Culik II, K., Yu, S. | | 1986 |
| Article | Reality construction as problem oriented docomposition: between (social) constructivism and realism | Birrer, F.A.J. | | 1994 |
| Article | Realization of Generalized Good Translation Algorithm on Computer | Kopriva, J. | | 1967 |
| 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 | Recognizable picture languages and domino tiling | Latteux, M., Simplot, D. | | 1997 |
| Article | Recording the Use of Memory in Right-Boundary Grammars and Push-Down Automata | Ehrenfeucht, A., Hoogeboom, H.J., Rozenberg, G. | | 1988 |
| Article | Recurrent words and simultaneous growth in T0L systems | Lange, K.-J., Welzl, E. | | 1982 |
| Article | Reducing Operators for Generalized Grammars | Novotny, M. | | 1990 |
| Article | Rees algebras and their varieties | Chajda, I., Duda, J. | | 1985 |
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