@article{TDM_2007_10_a13,
     author = {V. N. Sachkov},
     title = {Reduction operator and transforms with a hereditary {property.~II}},
     journal = {Trudy po diskretnoj matematike},
     pages = {269--286},
     publisher = {mathdoc},
     volume = {10},
     year = {2007},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TDM_2007_10_a13/}
}