1. Observation Equivalence as a Testing Equivalence;Abramsky;TCS,1987
2. A systematic method for designers;Archer,1965
3. Introduction to the ISO Specification Language LOTOS;Bolognesi;Computer Networks and ISDN Systems,1987
4. A Theory for the Derivation of Tests;Brinksma,1988
5. A formal approach to testing distributed systems;Brinksma,1991