Team, S. “Common Fixed Point Theorems for Six Weakly Compatible Mappings in D*-Metric Spaces: Shaban Sedghi, Duran Turkoglu, Nabi Shobe, Shahram Sedghi”. Thai Journal of Mathematics, vol. 7, no. 2, Dec. 2009, pp. 381-9, https://thaijmath2.in.cmu.ac.th/index.php/thaijmath/article/view/170.