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2. On a question of Lehmer and the number of irreducible factors of a polynomial;Dobrowolski;Acta Arith.,1979
3. On Lehmer's conjecture for elliptic curves;Hindry,1990
4. Fundamentals of Diophantine Geometry;Lang,1983
5. Minoration de la hauteur de Néron-Tate;Laurent,1983