@article{UZKU_2009_151_3_a6,
     author = {N. A. Barieva and I. A. Bikchantaev},
     title = {Riemann problem on a~two-sheeted surface of a~class~$O_{A^0B}$},
     journal = {U\v{c}\"enye zapiski Kazanskogo universiteta. Seri\^a Fiziko-matemati\v{c}eskie nauki},
     pages = {85--97},
     publisher = {mathdoc},
     volume = {151},
     number = {3},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/UZKU_2009_151_3_a6/}
}