Ivan Damgård Gudmund Skovbjerg Frandsen An Extended Quadratic Frobenius Primality Test with Average- and Worst-Case Error Estimate. 489-520 2006 19 J. Cryptology 4 http://dx.doi.org/10.1007/s00145-006-0332-x db/journals/joc/joc19.html#DamgardF06