@article{AA_2013_25_5_a0,
     author = {A. Badanin and E. Korotyaev},
     title = {Third order operator with periodic coefficients on the real axis},
     journal = {Algebra i analiz},
     pages = {1--31},
     year = {2013},
     volume = {25},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_2013_25_5_a0/}
}