1. Note on a quartic congruence;Carlitz;Am. Math. Monthly,1956
2. The general congruence of 4th degree modulo p, p prime;Skolem;Norsk. Mat. Tidsskr.,1952
3. On a certain connection between the discriminant of a polynomial and the number of its irreducible factors mod p;Skolem;Norsk. Mat. Tidsskr.,1952
4. Factorization of polynomials over finite fields;Swan;Pacific J. Math.,1962