@article{VMUMM_1984_3_a2,
     author = {G. Sh. Guseinov},
     title = {A quadratic bundle of {Sturm--Liouville} operators with periodic coefficients},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {14--21},
     publisher = {mathdoc},
     number = {3},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1984_3_a2/}
}