1. Abramsky S. Experiments, Power domains, and Fully Abstract Models for Applicative Multiprogramming FCT 83, Borgholm Springer-Verlag, LNCS 158 (83) pp. 1–13
2. Arnold A., Dicky A. An Algebraic Characterization of Transition System Equivalence, Report I-8603, Université de Bordeaux (86)
3. Bekić H. Definable Operations in General Algebras, and the Theory of Automata and Flowcharts, IBM Laboratory Vienna (69) also in: Programming Languages and their Definition, selected papers of H. Bekić, Springer-Verlag LNCS 177(84)
4. Bergstra J.A., Klop J.W., Olderog E.R. Readies and Failures in the Algebra of Communicating Processes, Report CS-R8523, CWI, Amsterdam (85)
5. Boasson L., Nivat M. Adherences of Languages, JCSS 20 (80) pp. 285–309