@article{MZM_1989_46_3_a3,
     author = {V. A. Koshcheev},
     title = {Chebyshev systems of functions and vector fields on spheres},
     journal = {Matemati\v{c}eskie zametki},
     pages = {22--30},
     publisher = {mathdoc},
     volume = {46},
     number = {3},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1989_46_3_a3/}
}