@article{KUKZ_1970_7_7_a43,
     author = {M. I. Khaikin},
     title = {The exceptional case of the {Riemann} problem},
     journal = {Trudy seminara po kraevym zada\v{c}am},
     pages = {283--288},
     publisher = {mathdoc},
     volume = {7},
     number = {7},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/KUKZ_1970_7_7_a43/}
}