Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{MASLO_1976__26_2_a3, author = {Ru\v{z}ick\'y, Eugen}, title = {The incidence submanifold of $RP^n\times G_1(RP^n)$ for $n$ odd is nonorientable}, journal = {Mathematica slovaca}, pages = {101--102}, publisher = {mathdoc}, volume = {26}, number = {2}, year = {1976}, mrnumber = {0431238}, zbl = {0319.55012}, language = {en}, url = {http://geodesic.mathdoc.fr/item/MASLO_1976__26_2_a3/} }
Ružický, Eugen. The incidence submanifold of $RP^n\times G_1(RP^n)$ for $n$ odd is nonorientable. Mathematica slovaca, Tome 26 (1976) no. 2, pp. 101-102. http://geodesic.mathdoc.fr/item/MASLO_1976__26_2_a3/