@article{KUKZ_1966_3_3_a22,
     author = {L. I. Chibrikova and G. V. Markov},
     title = {Certain boundary value problems on non-orientable surfaces},
     journal = {Trudy seminara po kraevym zada\v{c}am},
     pages = {225--229},
     publisher = {mathdoc},
     volume = {3},
     number = {3},
     year = {1966},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/KUKZ_1966_3_3_a22/}
}