@article{JMAG_2000_7_3_a6,
     author = {M. A. Pankov},
     title = {Irregular subsets of the {Grassmannian} manifolds and their maps},
     journal = {\v{Z}urnal matemati\v{c}eskoj fiziki, analiza, geometrii},
     pages = {331--344},
     year = {2000},
     volume = {7},
     number = {3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JMAG_2000_7_3_a6/}
}