1. The Design and Analysis of Computer Algorithms;Aho,1974
2. An algebraic approach to problem solution and problem semantics;Bertoni,1977
3. Three efficient algorithms for counting problems;Bertoni;Information Processing Lett.,1979
4. A characterization of the class of functions computable in polynomial time on random access machines;Bertoni;Proc. 15th ACM STOC,1981
5. The Computational Complexity of Algebraic and Numeric Problems;Borodin,1975