@article{10_37236_1814,
     author = {Allen Knutson and Terence Tao and Christopher Woodward},
     title = {A positive proof of the {Littlewood-Richardson} rule using the octahedron recurrence},
     journal = {The electronic journal of combinatorics},
     year = {2004},
     volume = {11},
     number = {1},
     doi = {10.37236/1814},
     zbl = {1053.05119},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/1814/}
}