@article{AL_2021_60_2_a5,
     author = {M. Kh. Faizrakhmanov},
     title = {Some properties of the upper semilattice of computable families of computably enumerable sets},
     journal = {Algebra i logika},
     pages = {195--209},
     publisher = {mathdoc},
     volume = {60},
     number = {2},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_2021_60_2_a5/}
}