@article{SM_2009_200_10_a6,
     author = {A. V. Tsarev},
     title = {Pure subrings of the rings $\mathbb Z_\chi$},
     journal = {Sbornik. Mathematics},
     pages = {1537--1563},
     year = {2009},
     volume = {200},
     number = {10},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2009_200_10_a6/}
}