Conjugate Algebraic Integers on a Circle with Irrational Center. Veikko Ennola — 1973 Mathematische Zeitschrift
Solution of a cyclotomic diophantine equation. Veikko Ennola — 1975 Journal für die reine und angewandte Mathematik
Proof of a conjecture of Morris Newman. Veikko Ennola — 1973 Journal für die reine und angewandte Mathematik
Fundamental units in a family of cubic fields Veikko Ennola — 2004 Journal de Théorie des Nombres de Bordeaux Let 𝒪 be the maximal order of the cubic field generated by a zero ε of x 3 + ( ℓ - 1 ) x 2 - ℓ x - 1 for ℓ ∈ ℤ , ℓ ≥ 3 . We prove that ε , ε - 1 is a fundamental pair of units for 𝒪 , if [ 𝒪 : ℤ [ ε ] ] ≤ ℓ / 3 .