@article{MZM_1970_7_3_a6,
     author = {N. I. Gurarii and Yu. I. Sozonov},
     title = {Normed spaces in which the unit sphere has no bias},
     journal = {Matemati\v{c}eskie zametki},
     pages = {307--310},
     publisher = {mathdoc},
     volume = {7},
     number = {3},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1970_7_3_a6/}
}