@article{MAIS_2012_19_4_a4,
     author = {V. V. Tikhov},
     title = {Countable {Ideals} in a {Semi-Lattice}  of the $\mathbf{D}_e$ {Enumeration} {Degrees}},
     journal = {Modelirovanie i analiz informacionnyh sistem},
     pages = {59--66},
     publisher = {mathdoc},
     volume = {19},
     number = {4},
     year = {2012},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MAIS_2012_19_4_a4/}
}