@article{AL_1987_26_5_a2,
     author = {V. P. Dobritsa},
     title = {Semilattices of computable indexings of classes of},
     journal = {Algebra i logika},
     pages = {558--576},
     publisher = {mathdoc},
     volume = {26},
     number = {5},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1987_26_5_a2/}
}