@article{ZNSL_1972_27_a5,
     author = {V. A. Zalgaller},
     title = {On $k$-directions which are singular for a~convex body~$F$ in~$R^n$},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {67--72},
     publisher = {mathdoc},
     volume = {27},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1972_27_a5/}
}