Estimation Optimale de sommes Exponentielles Harald Niederreiter, Hugh L. Montgomery (1977) Δελτίο της Ελληνικής Μαθηματικής Εταιρίας
Existence of Good Lattice Points in the Sense of Hlawka. Harald Niederreiter (1978/1979) Monatshefte für Mathematik
Exponential sums associated with algebraic number fields. R. Narasimhan, K. Chandrasekharan (1979) Commentarii mathematici Helvetici