Cooper, Shaun2013-05-082013-05-082002Cooper, S. (2002), On the number of representations of certain integers as sums of eleven or thirteen squares, Research Letters in the Information and Mathematical Sciences, 3, 37-581175-2777http://hdl.handle.net/10179/4369enIntegersOn the number of representations of certain integers as sums of eleven or thirteen squaresArticle