@article{10_1090_S0894_0347_01_00385_X,
     author = {Fomin, Sergey and Zelevinsky, Andrei},
     title = {Cluster algebras {I:} {Foundations}},
     journal = {Journal of the American Mathematical Society},
     pages = {497--529},
     publisher = {mathdoc},
     volume = {15},
     number = {2},
     year = {2002},
     doi = {10.1090/S0894-0347-01-00385-X},
     url = {http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-01-00385-X/}
}