@article{KUKZ_1977_14_14_a14,
     author = {Yu. M. Krikunov},
     title = {An equation whose order degenerates along the line of change of type},
     journal = {Trudy seminara po kraevym zada\v{c}am},
     pages = {137--140},
     publisher = {mathdoc},
     volume = {14},
     number = {14},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/KUKZ_1977_14_14_a14/}
}