1. Bell J.S.: Speakable and Unspeakable inQuantum Mechamics. Cambridge University Press, Cambridge 2004
2. Norsen, T.: Found. Phys. Lett. 19, 633 (2006);
3. Found. Phys. 37, 311 (2007)
4. Peres A.: Quantum Theory: Concepts and Mehtods. Dordrecht: Kluwer Academic Publishers, 1993
5. Horodecki, R., Horodecki, P., Horodecki, M., Horodecki, K.: Rev. Mod. Phys., in press, available at http://arxiv.org/list/quant-ph/0702225v2 , 2007