@article{IVM_2006_7_a1,
     author = {V. A. Gorkavyy},
     title = {On conformal transformations of surfaces in {Minkowski} space with preservation of the {Grassmann} image},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {13--24},
     publisher = {mathdoc},
     number = {7},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2006_7_a1/}
}