M. Akram, Certain types of vague cycles and vague trees, J. Intell. Fuzzy Syst., 28 (2015) 621-631.
 M. Akram, W. J. Chen and K. P. Shum, Some properties of vague graphs, Southeast Asian Bull. Math., 37 (2013) 307-324.
 M. Akram, W. A. Dudek and M. M. Yousaf, Regularity in vague intersection graphs and vague line graphs, In Abstract and Applied Analysis (Vol. 2014), Hindawi.
 M. Akram, A. Farooq, A. B. Saeid, and K. P. Shum, Certain types of vague cycles and vague trees, J. Intell. Fuzzy Syst., 28 No. 2 (2015) 621-631.
 S. Banitalebi and R. A. Borzooei Domination of vague graphs by using of strong arcs, submitted.
 R. A. Borzooei and H. Rashmanlou, Domination in vague graph and its application, J. Intell. Fuzzy Syst., 29 (2015) 1933-1940.
 R. A. Borzooei and H. Rashmanlou, Degree of vertices in vague graphs, J. Appl. Math. Informatics, 33 (2015) 545-557.
 R. A. Borzooei and H. Rashmanlou, S. Samanta and M. Pal, Regularity of vague graphs, J. Intell. Fuzzy Syst., 30 No. 6 (2016) 3681-3689.
 E. J. Cockayne and S. Hedetniem, Towards a theory of domination in graphs, Networks, 7 (1977) 247-261.
 W. L. Gau and D. J. Buehrer, Vague sets, IEEE Trans. Syst. Man Cybern. Syst., 23 No. 2 (1993) 610-614.
 B. S. Hoseini, M. Akram, M. S. Hoseini, H. Rashmanlou and R. A. Borzooei, Maximal product of graphs under vague environment, Math. Comput. Appl., 25 No. 1 (2020) 10.
 V. R. Kulli and B. Janakiram, The cobondage number of a graph, Discuss. Math. Graph Theory, 16 No. 2 (1996) 111-117.
 A. Nagoor Gani and V. T. Chandrasekaran, Domination in fuzzy graph, Adv. Fuzzy Syst., 1 No. 1 (2006) 17-26.
 A. Nagoor Gani and K. Prasanna Devi, 2-domination in fuzzy graphs, Int. J. Fuzzy Syst., 1 (2015) 119-124.
 A. Nagoor Gani and K. Prasanna Devi, Reduction of domination parameter in fuzzy graphs, Glob. J. Pure Appl. Math., 13 No. 7 (2017) 3307-3315.
 R. Parvathi, G. Thamizhendhi, Domination in intuitionistic fuzzy graphs, Fourteenth International Conference on Intuitionistic Fuzzy Sets, Sofia, 16 No. 2 (2010) 39-49.
 N. Ramakrishna, Vague graphs, International Journal of Computational Cognition, 7 (2009) 51-58.
 H. Rashmanlou and R. A. Borzooei, Product vague graphs and its applications, J. Intell. Fuzzy Syst., 30 No. 1 (2016) 371-382.
 H. Rashmanlou, S. Samanta, M. Pal and R. A. Borzooei, Product of bipolar fuzzy graphs and their degree, Int. J. Gen. Syst., 45 No. 1 (2016) 1-14.
 A. Rosenfeld, Fuzzy graphs, Fuzzy Sets and their Applications, (L. A. Zadeh, K. S. Fu and M. Shimura, Eds.), Academic Press, New York, (1975) 77-95.
 A. Somasundaram and S. Somasundaram, Domination in fuzzy graphs-I, Pattern Recognit. Lett., 19 (1998) 787-791.
 L. A. Zadeh, Fuzzy sets, Inf. Control., 8 (1965) 338-353.