1. Quantum structures 1

   Introduction Pages: 787 - 787

2. Filters and supports in orthoalgebras

   • D. J. Foulis
   • R. J. Greechie
   • G. T. Rüttimann

   OriginalPaper Pages: 789 - 807

3. Semantic incompleteness of quantum physics

   • Claudio Garola

   OriginalPaper Pages: 809 - 824

4. Systems of covariance in quantum probability

   • Stanley Gudder

   OriginalPaper Pages: 825 - 834

5. Structure of the set of annihilators

   • Karsten Keller

   OriginalPaper Pages: 835 - 842

6. Concrete quantum logics with covering properties

   • Vladimir Müller
   • Pavel Pták
   • Josef Tkadlec

   OriginalPaper Pages: 843 - 854

7. Boolean transfer from coherent quantum logics to quantum logics with continuous superselection rules

   • Hirokazu Nishimura

   OriginalPaper Pages: 855 - 869

8. Orthostructures from sesquilinear forms. A primer

   • Robert Piziak

   OriginalPaper Pages: 871 - 879

9. Modular almost orthogonal quantum logics

   • Sylvia Pulmannová
   • Zdenka Riečanová

   OriginalPaper Pages: 881 - 888

10. Regular measures and inner product spaces

    • Anatolij Dvurečenskij

    OriginalPaper Pages: 889 - 905