1. A domain equation for bisimulation;Abramsky;Information and Computation,1991
2. Nested semantics over finite tree are equationally hard;Aceto;Information and Computation,2004
3. 2-nested simulation is not finitely equationally axiomatizable;Aceto,2001
4. Ready to preorder: get your BCCSP axiomatization for free!;Aceto,2007
5. On the axiomatizability of ready traces, ready simulation, and failure traces;Blom,2003