@article{SM_1988_61_1_a4,
     author = {P. E. Markov},
     title = {Infinitesimal higher order bendings of multidimensional surfaces in spaces of constant curvature},
     journal = {Sbornik. Mathematics},
     pages = {65--85},
     publisher = {mathdoc},
     volume = {61},
     number = {1},
     year = {1988},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1988_61_1_a4/}
}