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\bibitem{Rodriguez-Alvarez_etal2010} Rodriguez-Alvarez, M. J., Sanchez, F., Soriano, A., \& Iborra, A. (2010). Sparse Givens resolution of large system of linear equations: Applications to image reconstruction. \textit{Math. Comput. Model.}, \textit{52}(7-8), 1258--1264.

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