@article{SIGMA_2008_4_a67,
     author = {Miranda C. N. Cheng and Erik P. Verlinde},
     title = {Wall {Crossing,} {Discrete} {Attractor} {Flow} and {Borcherds} {Algebra}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2008},
     volume = {4},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2008_4_a67/}
}