1. LONG LINES ON THE SPHEROID
2. Hemmerle, J. “Statistical computations on a digital computer”, Blaisdell Co., New York, 1967.
3. Hamming, R. W. “Numerical methods for Scientists and Engineers”, McGraw Hill, New York, 1962.
4. I. B. M. Corporation Reference Manual, Random number generation and testing, New York, 1967.