Paolo Montuschi Javier D. Bruguera Luigi Ciminiera José-Alejandro Piñeiro A Digit-by-Digit Algorithm for mth Root Extraction. 1696-1706 2007 56 IEEE Trans. Computers 12 http://doi.ieeecomputersociety.org/10.1109/TC.2007.70764 db/journals/tc/tc56.html#MontuschiBCP07