On the p-divisibility of Fermat quotients. - Reijo Ernvall; Tauno Metsänkylä (Math. Comput., 1997)

Irregular Primes and Cyclotomic Invariants to 12 Million. - Joe Buhler; Richard E. Crandall; Reijo Ernvall; Tauno Metsänkylä; Mohammad Amin Shokrollahi (J. Symb. Comput., 2001)

Groups of Divisors: 10893. - Andrei Jorza; John H. Lindsey II; Anne-Maria Ernvall; Reijo Ernvall (Am. Math. Mon., 2003)