An efficient solution of the congruence x2+ky2=mpmod{n}. - John M. Pollard; Claus-Peter Schnorr (IEEE Trans. Inf. Theory, 1987)

The Number Field Sieve - Arjen K. Lenstra; Hendrik W. Lenstra Jr.; Mark S. Manasse; John M. Pollard (STOC, 1990)

Kangaroos, Monopoly and Discrete Logarithms. - John M. Pollard (J. Cryptol., 2000)

Computing discrete logarithms in an interval. - Steven D. Galbraith; John M. Pollard; Raminder S. Ruprai (Math. Comput., 2013)