@article{VM_2013_15_2_a3,
     author = {Charles West},
     title = {The m x n {Series}},
     journal = {Visual Mathematics},
     publisher = {mathdoc},
     volume = {15},
     number = {2},
     year = {2013},
     url = {http://geodesic.mathdoc.fr/item/VM_2013_15_2_a3/}
}