Thambipillai Srikanthan Siew Kei Lam Mishra Suman Area-Time Efficient Sign Detection Technique for Binary Signed-Digit Number System. 69-72 2004 53 IEEE Trans. Computers 1 http://csdl.computer.org/comp/trans/tc/2004/01/t0069abs.htm db/journals/tc/tc53.html#SrikanthanLS04