Bruce E. Litow. On Sums of Roots of Unity. In Samson Abramsky, Cyril Gavoille, Claude Kirchner, Friedhelm Meyer auf der Heide, Paul G. Spirakis, editors, Automata, Languages and Programming, 37th International Colloquium, ICALP 2010, Bordeaux, France, July 6-10, 2010, Proceedings, Part I. Volume 6198 of Lecture Notes in Computer Science, pages 420-425, Springer, 2010. [doi]
Abstract is missing.