@article{SM_2002_193_11_a4,
     author = {S. V. Tikhonov and V. I. Yanchevskii},
     title = {The indices of central simple algebras over function fields of projective spaces over $P_{n,r}$-fields},
     journal = {Sbornik. Mathematics},
     pages = {1691--1705},
     publisher = {mathdoc},
     volume = {193},
     number = {11},
     year = {2002},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2002_193_11_a4/}
}