@article{VM_2012_14_2_a0,
     author = {S. Nakamura and D. Minematsu and T. Kitagawa and Y. Naito and R. Fujii and T. hieda and R. Miyadera},
     title = {Chocolate games that are variant of nim and interestingf graphs made by games},
     journal = {Visual Mathematics},
     publisher = {mathdoc},
     volume = {14},
     number = {2},
     year = {2012},
     url = {http://geodesic.mathdoc.fr/item/VM_2012_14_2_a0/}
}