Nguyen และ Ba Hung. (1999) Design and analysis of the algorithm for solving factorial problem of any reasonably large number using the power-decimal system. Mahidol University,:ม.ป.ท.Nguyen และ Ba Hung. 1999. Design and analysis of the algorithm for solving factorial problem of any reasonably large number using the power-decimal system. ม.ป.ท.:Mahidol University,;Nguyen และ Ba Hung. Design and analysis of the algorithm for solving factorial problem of any reasonably large number using the power-decimal system. ม.ป.ท.:Mahidol University, 1999. Print.