1. Effect algebras and unsharp quantum logics

   • D. J. Foulis
   • M. K. Bennett

   Part III. Invited Papers Dedicated to Constantin Piron Pages: 1331 - 1352

2. Quantum, classical and intermediate: An illustrative example

   • Diederik Aerts
   • Thomas Durt

   Part III. Invited Papers Dedicated to Constantin Piron Pages: 1353 - 1369

3. Spin precession revisited

   • Ph. A. Martin
   • M. Sassoli de Bianchi

   Part III. Invited Papers Dedicated to Constantin Piron Pages: 1371 - 1378

4. Classical field theory and analogy between Newton's and Maxwell's equations

   • Zbigniew Oziewicz

   Part III. Invited Papers Dedicated to Constantin Piron Pages: 1379 - 1402

5. Quantum logics and hilbert space

   • Sylvia Pulmannová

   Part III. Invited Papers Dedicated to Constantin Piron Pages: 1403 - 1414

6. Embedding of the classical into the quantum description of photons

   • M. Enderle
   • H. Neumann

   Part III. Invited Papers Dedicated to Constantin Piron Pages: 1415 - 1424

7. Nearly orthosymmetric ortholattices and hilbert spaces

   • R. Mayet
   • S. Pulmannová

   Part III. Invited Papers Dedicated to Constantin Piron Pages: 1425 - 1437

8. The logic of quantum systems with diagonal singularities

   • I. Antoniou
   • Z. Suchanecki

   Part III. Invited Papers Dedicated to Constantin Piron Pages: 1439 - 1457