@article{Grechneva_Stegantseva_2016, title={On the existence of a surface in the pseudo-Euclidean space
with given Grassman image}, volume={68}, url={http://umj.imath.kiev.ua/index.php/umj/article/view/1923}, abstractNote={We study the properties of submanifolds of the Grassmanian manifold of the four-dimensional pseudo-Euclidean space and
also the Grassman image of a surface in this space. The theorem on the existence of a surface in the pseudo-Euclidean
space with the given Grassman image is formulated and proved.}, number={10}, journal={Ukrainsâ€™kyi Matematychnyi Zhurnal}, author={GrechnevaM. A. and StegantsevaP. G.}, year={2016}, month={Oct.}, pages={1320=1329} }