@article{SM_1984_47_2_a4,
     author = {A. I. Zimin},
     title = {Blocking sets of terms},
     journal = {Sbornik. Mathematics},
     pages = {353--364},
     publisher = {mathdoc},
     volume = {47},
     number = {2},
     year = {1984},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1984_47_2_a4/}
}