Sommaire du Fascicule no. 1-3

On some path problems on oriented hypergraphs
p. 1-20
Sur les automates circulaires et la conjecture de Černý
p. 21-34
Semantics of flowchart programs and the free Conway theories
p. 35-78
On the inclusion problem for finitely ambiguous rational trace languages
p. 79-98

Sommaire du Fascicule no. 4-6

Towards parallelization of concurrent systems
p. 99-125
Finite idempotent groupoids and regular languages
p. 127-140
Analysis of algorithms for the recognition of rational and context-free trace languages
p. 141-152
Associative closure and periodicity of ω-words
p. 153-174
Shuffle binoids
p. 175-198