Journal Article Estimates for singular multiplicative character sums Get access Antonio Rojas-León Antonio Rojas-León Search for other works by this author on: Oxford Academic Google Scholar International Mathematics Research Notices, Volume 2005, Issue 20, 2005, Pages 1221–1234, https://doi.org/10.1155/IMRN.2005.1221 Published: 01 January 2005 Article history Received: 25 November 2004 Published: 01 January 2005 Accepted: 26 April 2005