| 2009 | 
|---|
| 4 | EE | K. Rustan M. Leino,
Ronald Middelkoop:
Proving Consistency of Pure Methods and Model Fields.
FASE 2009: 231-245 | 
| 2008 | 
|---|
| 3 | EE | Ronald Middelkoop,
Cornelis Huizing,
Ruurd Kuiper,
Erik J. Luit:
Invariants for Non-Hierarchical Object Structures.
Electr. Notes Theor. Comput. Sci. 195: 211-229 (2008) | 
| 2 | EE | Ronald Middelkoop,
Cornelis Huizing,
Ruurd Kuiper,
Erik J. Luit:
Specification and Verification of Invariants by Exploiting Layers in OO Designs.
Fundam. Inform. 85(1-4): 377-398 (2008) | 
| 2006 | 
|---|
| 1 | EE | Ronald Middelkoop,
Cornelis Huizing,
Ruurd Kuiper,
Erik J. Luit:
Cooperation-based Invariants for OO Languages.
Electr. Notes Theor. Comput. Sci. 160: 225-237 (2006) |