@article{AA_2019_31_4_a5,
     author = {Ya. N. Nuzhin and A. V. Stepanov},
     title = {Subgroups of {Chevalley} groups of types $ B_l$ and $ C_l$ containing the group over a subring, and corresponding carpets},
     journal = {Algebra i analiz},
     pages = {198--224},
     publisher = {mathdoc},
     volume = {31},
     number = {4},
     year = {2019},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_2019_31_4_a5/}
}