@article{ADM_2006_1_a4,
     author = {Andrey Kostin},
     title = {Cohomology of the categorical at zero semigroups},
     journal = {Algebra and discrete mathematics},
     pages = {51--66},
     publisher = {mathdoc},
     number = {1},
     year = {2006},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ADM_2006_1_a4/}
}