@article{DM_1991_3_1_a11,
     author = {V. D. Shmatkov},
     title = {Isomorphisms of incidence algebras},
     journal = {Diskretnaya Matematika},
     pages = {133--144},
     publisher = {mathdoc},
     volume = {3},
     number = {1},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_1991_3_1_a11/}
}