Robert Brijder, Andrzej Ehrenfeucht, Grzegorz Rozenberg. Reaction Systems with Duration. In Jozef Kelemen, Alica Kelemenová, editors, Computation, Cooperation, and Life - Essays Dedicated to Gheorghe Paun on the Occasion of His 60th Birthday. Volume 6610 of Lecture Notes in Computer Science, pages 191-202, Springer, 2011. [doi]
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