@article{NUMA_1987__55_4_133345,
     author = {A. Bunse-Gerstner and R. Byers and ...},
     title = {A {Quaternion} {QR} {Algorithm.}},
     journal = {Numerische Mathematik},
     pages = {83--96},
     publisher = {mathdoc},
     volume = {55},
     number = {4},
     year = {1987},
     zbl = {0681.65024},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1987__55_4_133345/}
}