H. Bordihn & M. Holzer (1999):
On a hierarchy of languages generated by cooperating distributed grammar systems.
Information Processing Letters 69(2),
pp. 59–62,
doi:10.1016/S0020-0190(98)00200-2.
E. Csuhaj-Varjú & J. Dassow (1990):
On cooperating/distributed grammar systems.
J. Inf. Process. Cybern. EIK (formerly Elektron. Inf.verarb. Kybern. 26(1/2),
pp. 49–63.
E. Csuhaj-Varjù, J. Dassow, J. Kelemen & Gh. Păun (1994):
Grammar Systems. A Grammatical Approach to Distribution and Cooperation.
Gordon and Breach, London.
J. Dassow & Gh. Păun (1989):
Regulated Rewriting in Formal Language Theory.
EATCS Monographs in Theoretical Computer Science 18.
Springer Berlin,
doi:10.1007/978-3-642-74932-2.
H. Fernau (2003):
Parallel Grammars: A Phenomenology.
GRAMMARS 6,
pp. 25–87,
doi:10.1023/A:1024087118762.
H. Fernau & R. Freund (1996):
Bounded parallelism in array grammars used for character recognition.
In: P. Perner, P. Wang & A. Rosenfeld: Advances in Structural and Syntactical Pattern Recognition (Proceedings of the SSPR'96),
Lecture Notes in Computer Science 1121.
Springer,
pp. 40–49,
doi:10.1007/3-540-61577-6_5.
H. Fernau, R. Freund & M. Holzer (1996):
External versus Internal Hybridization for Cooperating Distributed Grammar Systems.
Technical Report TR 185–2/FR–1/96.
Technische Universität Wien (Austria).
H. Fernau, R. Freund & M. Holzer (2001):
Hybrid modes in cooperating distributed grammar systems: internal versus external hybridization.
Theoretical Computer Science 259(1–2),
pp. 405–426,
doi:10.1016/S0304-3975(00)00022-0.
H. Fernau, R. Freund & M. Holzer (2003):
Hybrid modes in cooperating distributed grammar systems: combining the t-mode with the modesłeq k and = k.
Theoretical Computer Science 299,
pp. 633–662,
doi:10.1016/S0304-3975(02)00541-8.
H. Fernau & M. Holzer (1996):
Accepting multi-agent systems II.
Acta Cybernetica 12,
pp. 361–379.
H. Fernau & M. Holzer (1997):
Conditional context-free languages of finite index.
In: Gh. Păun & A. Salomaa: New Trends in Formal Languages,
Lecture Notes in Computer Science 1218.
Springer,
pp. 10–26,
doi:10.1007/3-540-62844-4_2.
R. Meersman & G. Rozenberg (1978):
Cooperating grammar systems.
In: Proceedings of Mathematical Foundations of Computer Science MFCS'78,
Lecture Notes in Computer Science 64.
Springer,
pp. 364–374,
doi:10.1007/3-540-08921-7_84.
V. Mitrana (1993):
Hybrid cooperating/distributed grammar systems.
Computers and Artificial Intelligence 12(1),
pp. 83–88.
Gh. Păun (1994):
On the generative capacity of hybrid CD grammar systems.
J. Inf. Process. Cybern. EIK (formerly Elektron. Inf.verarb. Kybern.) 30(4),
pp. 231–244.
G. Rozenberg & A. Salomaa (1997):
Handbook of Formal Languages, 3 volumes.
Springer, Berlin.
G. Rozenberg & D. Vermeir (1978):
On the effect of the finite index restriction on several families of grammars; Part 2: context dependent systems and grammars.
Foundations of Control Engineering 3(3),
pp. 126–142.