1. Whitehead, A., Russell, B.: Principia Mathematica. Cambridge University Press (1912)
2. Sowa, J.: Knowledge Representation: Logical, Philosophical, and Computational Foundations. Brooks Cole Publishing (2000)
3. Birkhoff, G.: Lattice Theory. American Mathematical Society Colloquium Publications (1967)
4. Beran, L.: Orthomodular Lattices. D. Reidel Pubs (1985)
5. Trillas, E., Renedo, E., Alsina, C.: On three laws typical of Booleanity. In: Proceedings NAFIPS 2004, vol. 2 (2004)