@article{IM2_1993_41_2_a6,
     author = {E. G. Sklyarenko},
     title = {Connection homology and cohomology between sets. {Enclosure} homology and cohomology of a closed set},
     journal = {Izvestiya. Mathematics},
     pages = {307--335},
     year = {1993},
     volume = {41},
     number = {2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1993_41_2_a6/}
}