@article{NUMA_1987__51_133195,
     author = {James Weldon Demmel},
     title = {On {Condition} {Numbers} and the {Distance} to the {Nearest} {Ill-posed} {Problem.}},
     journal = {Numerische Mathematik},
     pages = {251--290},
     publisher = {mathdoc},
     volume = {51},
     year = {1987},
     zbl = {0597.65036},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1987__51_133195/}
}