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@article{MT_1988_10_a7, author = {A. D. Korshunov}, title = {The power and structure of closed {Post} classes (families of subsets of a finite set)}, journal = {Matemati\v{c}eskie trudy}, pages = {159--204}, publisher = {mathdoc}, volume = {10}, year = {1988}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MT_1988_10_a7/} }
A. D. Korshunov. The power and structure of closed Post classes (families of subsets of a finite set). Matematičeskie trudy, Tome 10 (1988), pp. 159-204. http://geodesic.mathdoc.fr/item/MT_1988_10_a7/