@article{ZNSL_1973_33_a5,
     author = {P. P. Tammela},
     title = {Two notes on {Bravais} variety},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {90--93},
     publisher = {mathdoc},
     volume = {33},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1973_33_a5/}
}