@article{MS2_1967__21_166019,
     author = {Andrew Sobczyk},
     title = {The {Obliquity-Type} of a {Set} of {Vectors.}},
     journal = {Mathematica Scandinavica},
     pages = {195--198},
     publisher = {mathdoc},
     volume = {21},
     year = {1967},
     zbl = {0174.52603},
     url = {http://geodesic.mathdoc.fr/item/MS2_1967__21_166019/}
}