@article{GDZPPN002349167, title = {The Obliquity-Type of a Set of Vectors.}, journal = {Mathematica Scandinavica}, volume = {20}, year = {1967}, pages = {195-198}, zbl = {0174.52603}, url = {http://dml.mathdoc.fr/item/GDZPPN002349167} }
Sobczyk, Andrew. The Obliquity-Type of a Set of Vectors.. Mathematica Scandinavica, Tome 20 (1967) pp. 195-198. http://gdmltest.u-ga.fr/item/GDZPPN002349167/