A lower bound on the size of k-neighborhood in generalized cubes
Yang, X., Megson, G.M., Cao, J. and Luo, J. 2006. A lower bound on the size of k-neighborhood in generalized cubes. Applied Mathematics and Computation. 179 (1), pp. 47-54. https://doi.org/10.1016/j.amc.2005.11.080