@article{NUMA_1970__15_132009,
     author = {A. DUBRULLE},
     title = {A {Short} {Note} on the {Implicit} {QL} {Algorithm} for {Symmetric} {Tridiagonal} {Matrices.}},
     journal = {Numerische Mathematik},
     pages = {450--450},
     publisher = {mathdoc},
     volume = {15},
     year = {1970},
     zbl = {0197.43001},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1970__15_132009/}
}