Voir la notice de l'article provenant de la source Novi sad journal of mathematics website
@article{NSJOM_2010_40_2a_10, author = {Libor Barto, and David Stanovsk\'y}, title = {Polymorphisms of small digraphs}, journal = {Novi Sad Journal of Mathematics}, pages = {95-109}, publisher = {mathdoc}, volume = {40}, number = {2}, year = {2010}, url = {http://geodesic.mathdoc.fr/item/NSJOM_2010_40_2a_10/} }
Libor Barto,; David Stanovský. Polymorphisms of small digraphs. Novi Sad Journal of Mathematics, Tome 40 (2010) no. 2. http://geodesic.mathdoc.fr/item/NSJOM_2010_40_2a_10/