@article{10_1090_S0894_0347_00_00331_3,
     author = {Derksen, Harm and Weyman, Jerzy},
     title = {Semi-invariants of quivers and saturation for {Littlewood-Richardson} coefficients},
     journal = {Journal of the American Mathematical Society},
     pages = {467--479},
     publisher = {mathdoc},
     volume = {13},
     number = {3},
     year = {2000},
     doi = {10.1090/S0894-0347-00-00331-3},
     url = {http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-00-00331-3/}
}