@article{10_4064_cm103_2_1,
     author = {Roberto Mart{\'\i}nez-Villa and Manuel Saor{\'\i}n},
     title = {Koszul duality for $N${-Koszul} algebras},
     journal = {Colloquium Mathematicum},
     pages = {155--168},
     publisher = {mathdoc},
     volume = {103},
     number = {2},
     year = {2005},
     doi = {10.4064/cm103-2-1},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm103-2-1/}
}