%0 Journal Article %A Jen-Chi Lee %A Catherine H. Yan %A Yi Yang %T High-energy string scattering amplitudes and signless Stirling number identity %J Symmetry, integrability and geometry: methods and applications %D 2012 %V 8 %U http://geodesic.mathdoc.fr/item/SIGMA_2012_8_a44/ %G en %F SIGMA_2012_8_a44