@article{PFMT_2011_3_a9,
     author = {P. A. Zhiznevsky},
     title = {Elements of the height 3 of the lattice of all $\tau$-closed $n$-multiply $\omega$-composition formations},
     journal = {Problemy fiziki, matematiki i tehniki},
     pages = {61--68},
     publisher = {mathdoc},
     number = {3},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PFMT_2011_3_a9/}
}