1. D W Boyd, Kronecker s Theorem and Lehmer's problem for polynomials in several variables, J Number Theory 13 (1981), 116–121
2. D W Boyd, Speculations concerning the range of Mahler's measure, Can Math Bull 24 (1981), 453–469
3. D Boyd, Mahler's measure and specral values of L-functions to appear in Jour of Expenmental Math (1998)
4. V Chothi, G Everest, and T Ward, S-integer dynamical systems Periodic points, J Reine Angew Math 489 (1997), 99–132
5. E Dobrowolski, On a question of Lehmer and the number of irreducible factors of a polynomial Acta Anth 34 (1979), 391–401