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@article{MS2_1974__34_166358, author = {Asmus L. Schmidt}, title = {On the {Approximation} of {Quaternions.}}, journal = {Mathematica Scandinavica}, pages = {184--186}, publisher = {mathdoc}, volume = {34}, year = {1974}, zbl = {0291.10026}, url = {http://geodesic.mathdoc.fr/item/MS2_1974__34_166358/} }
Asmus L. Schmidt. On the Approximation of Quaternions.. Mathematica Scandinavica, Tome 34 (1974), pp. 184-186. http://geodesic.mathdoc.fr/item/MS2_1974__34_166358/