1. Adamyan, V.A., Calude, C.S., Pavlov, B.S., 2004. Transcending the limits of Turing computability. In: Hida, T. (Ed.), Proceedings of Winter School, Meijo University, Japan, World Scientific, Singapore, to appear.
2. Alberts, B., Johnson, A., Lewis, J., Raff, M., Roberts, K., Walter, P., 2002. Molecular Biology of the Cell, fourth ed. Garland Science, New York.
3. The relevance of cell membrane for P systems. General aspects;Ardelean;Fundam. Informat,2002
4. The random number omega bids fair to hold the mysteries of the universe;Bennett;Sci. Am,1979
5. Bernardini, F., Gheorghe, M., 2003. On the power of minimal symport/antiport. In: Pre-proceedings of Workshop on Membrane Computing, WMC2003, Tarragona, GRLMC Report 28/03. Rovira i Virgili Univ., Tarragona 72–83.