@article{CMJ_2000_50_2_a5,
     author = {Pi\'oro, Konrad},
     title = {On some non-obvious connections between graphs and unary partial algebras},
     journal = {Czechoslovak Mathematical Journal},
     pages = {295--320},
     year = {2000},
     volume = {50},
     number = {2},
     mrnumber = {1761388},
     zbl = {1046.08002},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMJ_2000_50_2_a5/}
}