@article{05904714,
title = {Higher order Grassmann fibrations and the calculus of variations.},
journal = {Balkan Journal of Geometry and its Applications (BJGA)},
volume = {15},
year = {2010},
pages = {68-79},
zbl = {1227.49048},
language = {en},
url = {http://dml.mathdoc.fr/item/05904714}
}
Krupka, D.; Krupka, M. Higher order Grassmann fibrations and the calculus of variations.. Balkan Journal of Geometry and its Applications (BJGA), Tome 15 (2010) pp. 68-79. http://gdmltest.u-ga.fr/item/05904714/