@article{DAN_1988_298_3_a0,
     author = {G. P. Akilov and E. V. Kolesnikov and A. G. Kusraev},
     title = {Lebesgue extension of a positive operator},
     journal = {Doklady Akademii Nauk},
     pages = {521--524},
     publisher = {mathdoc},
     volume = {298},
     number = {3},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1988_298_3_a0/}
}