1. Abramowitz, M., Stegun, I.A., 1972. Handbook of Mathematical Functions - With Formulas, Graphs, and Mathematical Tables. U.S. Department of Commerce, National Bureau of Standards, Applied Mathematics Series 55.
2. Argonne Code Center: Benchmark Problem Book. ANL-7416-Supplement 2, Mathematics and Computers (UC-32), 1977. Computational Benchmark Problems Committee of the Mathematics and Computation Division of the American Nuclear Society. Argonne National Laboratory.
3. Christensen, B., 1985. Three-dimensional Static and Dynamic Reactor Calculations by the Nodal Expansion Method. National Laboratory DK-4000, Roskilde, Denmark.
4. A Semianalytic Two-Group Nodal Model for SIMULATE-3;Esser;Trans. Am. Nucl. Soc.,1993
5. The Method of Weighted Residuals - A Review;Finlayson;Applied Mechanics Reviews,1966