@article{IVM_1991_11_a3,
     author = {A. N. Vernik and D. Z. Il'yazova},
     title = {Extremal positive extensions of an infinite-dimensional analogue of the {Krein--Feller} differentiation operator},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {19--22},
     publisher = {mathdoc},
     number = {11},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1991_11_a3/}
}