@article{GDZPPN001185292,
title = {Constrained least squares methods for linear timevarying DAE systems.},
journal = {Numerische Mathematik},
volume = {59},
year = {1991},
pages = {145-162},
zbl = {0737.65055},
url = {http://dml.mathdoc.fr/item/GDZPPN001185292}
}
Barrlund, Anders. Constrained least squares methods for linear timevarying DAE systems.. Numerische Mathematik, Tome 59 (1991) pp. 145-162. http://gdmltest.u-ga.fr/item/GDZPPN001185292/