1. G. Chang, The upper bound on $k$-tuple domination numbers of graphs, European Journal of Combinatorics 29 (2008) 1333-1336.
2. F. Harary, T. W. Haynes, Double domination in graphs, Ars Combin. 55 (2000) 201-213.
3. T. W. Haynes, S. T. Hedetniemi, P. J. Slater (eds). Fundamentals Domination in Graphs, Marcel Dekker, Inc. New York, 1998.
4. T. W. Haynes, S. T. Hedetniemi, P. J. Slater (eds), Domination in Graphs: Advanced Topics, Marcel Dekker, Inc. New York, 1998.
5. M. A. Henning, A survey of selected recent results on total domination in graphs, Discrete Math., 309 (2009) 32-63.