Stem nonexist$ (all stems)
2 papers:
- DLT-2009-FreydenbergerR
- Existence and Nonexistence of Descriptive Patterns (DDF, DR), pp. 228–239.
- LICS-1990-Moller #axiom #finite
- The Nonexistence of Finite Axiomatisations for CCS Congruences (FM), pp. 142–153.