1. Aho, A.V., Hopcroft, J.E., Ullman, J.D.: The design and analysis of computer algorithms. Addison-Wesley, Reading (1974)
2. Allender, E., Loui, M.C., Regan, K.W.: Other Complexity Classes and Measures. Chapter 29. In: Atallah, M.J. (ed.) Algorithms and Theory of Computation Handbook, CRC Press, Boca Raton (1999)
3. Electronic Notes in Theoretical Computer Science;Q. Chen,2007
4. Du, D.-Z., Ko, K.-I.: Theory of Computational Complexity. John Wiley & Sons, Chichester (2000)
5. Hoover, H.J.: Feasible real functions and arithmetic circuits. SIAM J. Comput. 19(1), 182–204 (1990)