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
@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},
year = {1976},
volume = {26},
number = {2},
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/