@article{PFMT_2009_1_a9, author = {V. G. Safonov and I. N. Safonova}, title = {On reducible $\tau$-closed $\omega$-saturated formations with a soluble defect 2}, journal = {Problemy fiziki, matematiki i tehniki}, pages = {64--68}, publisher = {mathdoc}, number = {1}, year = {2009}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/PFMT_2009_1_a9/} }