Alfredo Buttari Jack Dongarra Julie Langou Julien Langou Piotr Luszczek Jakub Kurzak Mixed Precision Iterative Refinement Techniques for the Solution of Dense Linear Systems. 457-466 2007 21 IJHPCA 4 http://dx.doi.org/10.1177/1094342007084026 db/journals/ijhpca/ijhpca21.html#ButtariDLLLK07