@article{IVM_1970_1_a7,
     author = {I. I. Kal'mushevskii},
     title = {The completeness of the eigenfunctions and associated functions of operators in~$L^2[0,l]$},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {61--64},
     publisher = {mathdoc},
     number = {1},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1970_1_a7/}
}