@article{DM_2012_24_4_a3,
     author = {E. D. Schwab},
     title = {Lawvere intervals and the {M\"obius} function of {a~M\"obius} category},
     journal = {Diskretnaya Matematika},
     pages = {47--55},
     publisher = {mathdoc},
     volume = {24},
     number = {4},
     year = {2012},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_2012_24_4_a3/}
}