@article{JMAG_2004_11_1_a6,
     author = {R. F. Efendiev},
     title = {The inverse problem for a class of ordinary differential operators with periodic coefficients},
     journal = {\v{Z}urnal matemati\v{c}eskoj fiziki, analiza, geometrii},
     pages = {114--121},
     year = {2004},
     volume = {11},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/JMAG_2004_11_1_a6/}
}