@article{SVFU_2018_25_4_a0,
     author = {S. Z. Djamalov and S. G. Pyatkov},
     title = {Some classes of inverse problems for mixed type equations of second order},
     journal = {Matemati\v{c}eskie zametki SVFU},
     pages = {3--14},
     year = {2018},
     volume = {25},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/SVFU_2018_25_4_a0/}
}