A Coarse-Grained Parallel <i>QR</i>-Factorization Algorithm for Sparse Least Squares Problems.

Tzvetan Ostromsky Per Christian Hansen Zahari Zlatev A Coarse-Grained Parallel <i>QR</i>-Factorization Algorithm for Sparse Least Squares Problems. 937-964 1998 24 Parallel Computing 5-6 db/journals/pc/pc24.html#OstromskyHZ98