http://benji3up2kxewkqfcq7buxk2xd6zwy3zggnurkrm3l4cvwy2iipvyyad.onion/mirrors/gmpdoc/References.html
Niels Möller, “On Schönhage’s algorithm and subquadratic integer GCD
computation”, in Mathematics of Computation, volume 77, January 2008, pp.
589-607, https://www.ams.org/journals/mcom/2008-77-261/S0025-5718-07-02017-0/home.html Peter L. Montgomery, “Modular Multiplication Without Trial Division”, in
Mathematics of Computation, volume 44, number 170, April 1985.