@article{10_4153_CMB_1968_050_2,
     author = {Kahan, W.},
     title = {Circumscribing an {Ellipsoid} about the {Intersection} of {Two} {Ellipsoids}},
     journal = {Canadian mathematical bulletin},
     pages = {437--441},
     year = {1968},
     volume = {11},
     number = {3},
     doi = {10.4153/CMB-1968-050-2},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1968-050-2/}
}