1. J. J. Brogan , A Numerical Method of Solution for Heat Conduction in Composite Slabs with a Receding Surface , LMSD 288204 , Lockheed Missiles and Space Division, Lock heed Aircraft Corp. , Sunnyvale , Calif. , January 1960 .
2. C. B. Moyer and R. A. Rindal , Finite Difference Solution for the In-Depth Response of Charring Materials Considering Surface Chemical and Energy Balances , Final Report No. 66-7, Part II , Aerotherm Corp. , Mt. View , Calif. , March 1967 .
3. A novel finite difference formulation for differential expressions involving both first and second derivatives