@article{10_1090_S0894_0347_04_00473_4,
     author = {Buch, Anders},
     title = {Alternating signs of quiver coefficients},
     journal = {Journal of the American Mathematical Society},
     pages = {217--237},
     publisher = {mathdoc},
     volume = {18},
     number = {1},
     year = {2005},
     doi = {10.1090/S0894-0347-04-00473-4},
     url = {http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-04-00473-4/}
}