Bossut, F., Dauchet, M., Warin, B., 1988, "Automata and rational expressions on planar graphs", Lecture Notes in Computer Science, 13ième colloque Mathematical Foundations of

Computer Science, pp 190-200, ISBN 3-540-50110-X, Karlovy Vary, Tchécoslovaquie.

Bossut, F., Dauchet, M., Warin, B., 1988, "Automata and rational expressions on planar graphs", Lecture Notes in Computer Science, 13ième colloque Mathematical Foundations of

Computer Science, pp 190-200, ISBN 3-540-50110-X, Karlovy Vary, Tchécoslovaquie.

Bossut, F., Dauchet, M., Warin, B., 1988, "Automata and rational expressions on planar graphs", Lecture Notes in Computer Science, 13ième colloque Mathematical Foundations of

Computer Science, pp 190-200, ISBN 3-540-50110-X, Karlovy Vary, Tchécoslovaquie.

Bossut, F., Dauchet, M., Warin, B., 1988, "Automata and rational expressions on planar graphs", Lecture Notes in Computer Science, 13ième colloque Mathematical Foundations of

Computer Science, pp 190-200, ISBN 3-540-50110-X, Karlovy Vary, Tchécoslovaquie.

Bossut, F., Dauchet, M., Warin, B., 1988, "Automata and rational expressions on planar graphs", Lecture Notes in Computer Science, 13ième colloque Mathematical Foundations of

Computer Science, pp 190-200, ISBN 3-540-50110-X, Karlovy Vary, Tchécoslovaquie.

Bossut, F., Dauchet, M., Warin, B., 1988, "Automata and rational expressions on planar graphs", Lecture Notes in Computer Science, 13ième colloque Mathematical Foundations of

Computer Science, pp 190-200, ISBN 3-540-50110-X, Karlovy Vary, Tchécoslovaquie.

Bossut, F., Dauchet, M., Warin, B., 1988, "Automata and rational expressions on planar graphs", Lecture Notes in Computer Science, 13ième colloque Mathematical Foundations of

Computer Science, pp 190-200, ISBN 3-540-50110-X, Karlovy Vary, Tchécoslovaquie.

Bossut, F., Dauchet, M., Warin, B., 1988, "Automata and rational expressions on planar graphs", Lecture Notes in Computer Science, 13ième colloque Mathematical Foundations of

Computer Science, pp 190-200, ISBN 3-540-50110-X, Karlovy Vary, Tchécoslovaquie.

Bossut, F., Dauchet, M., Warin, B., 1988, "Automata and rational expressions on planar graphs", Lecture Notes in Computer Science, 13ième colloque Mathematical Foundations of

Computer Science, pp 190-200, ISBN 3-540-50110-X, Karlovy Vary, Tchécoslovaquie.

Bossut, F., Dauchet, M., Warin, B., 1988, "Automata and rational expressions on planar graphs", Lecture Notes in Computer Science, 13ième colloque Mathematical Foundations of

Computer Science, pp 190-200, ISBN 3-540-50110-X, Karlovy Vary, Tchécoslovaquie.

Bossut, F., Dauchet, M., Warin, B., 1988, "Automata and rational expressions on planar graphs", Lecture Notes in Computer Science, 13ième colloque Mathematical Foundations of

Computer Science, pp 190-200, ISBN 3-540-50110-X, Karlovy Vary, Tchécoslovaquie.

Bossut, F., Dauchet, M., Warin, B., 1988, "Automata and rational expressions on planar graphs", Lecture Notes in Computer Science, 13ième colloque Mathematical Foundations of

Computer Science, pp 190-200, ISBN 3-540-50110-X, Karlovy Vary, Tchécoslovaquie.