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@article{NUMA_1991__60_4_133589, author = {Anders Barrlund}, title = {Constrained least squares methods for linear timevarying {DAE} systems.}, journal = {Numerische Mathematik}, pages = {145--162}, publisher = {mathdoc}, volume = {60}, number = {4}, year = {1991}, zbl = {0737.65055}, url = {http://geodesic.mathdoc.fr/item/NUMA_1991__60_4_133589/} }
Anders Barrlund. Constrained least squares methods for linear timevarying DAE systems.. Numerische Mathematik, Tome 60 (1991) no. 4, pp. 145-162. http://geodesic.mathdoc.fr/item/NUMA_1991__60_4_133589/