@article{IM2_2011_75_3_a7,
     author = {Yu. V. Savateev},
     title = {An application of proof-nets to the study of fragments of the {Lambek} calculus},
     journal = {Izvestiya. Mathematics },
     pages = {631--663},
     publisher = {mathdoc},
     volume = {75},
     number = {3},
     year = {2011},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_2011_75_3_a7/}
}