Journal of Graph Theory
Journal of Graph Theory > 77 > 2 > 111 - 116
Journal of Graph Theory > 77 > 2 > 144 - 157
Journal of Graph Theory > 77 > 2 > 158 - 170
Journal of Graph Theory > 77 > 2 > 117 - 143
Journal of Graph Theory > 77 > 2 > 89 - 110