Efficient scalar multiplication based on window algorithm with 2's complement applied for elliptic curve cryptosystems. - Mohamed M. Abd-Eldayem; Ehab T. Alnfrawy; Aly A. Fahmy (ISDA, 2010)

Addition-Subtraction Chain for 160 bit Integers by using 2's Complement. - Mohamed M. Abd-Eldayem; Ehab T. Alnfrawy; Aly A. Fahmy (Egypt. Comput. Sci. J., 2010)