@article{NUMA_1982__39_132787,
     author = {J.E. Shirey},
     title = {Minimization of {Extended} {Quadratic} {Functions.}},
     journal = {Numerische Mathematik},
     pages = {157--162},
     year = {1982},
     volume = {39},
     zbl = {0491.65038},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1982__39_132787/}
}