Moeini, B., et al. “Related Fixed Point Results via $\mathit{C_{*}}$-Class Functions on $C^{*}$-Algebra-Valued $G_{b}$-Metric Spaces”. Carpathian Mathematical Publications, vol. 12, no. 1, June 2020, pp. 94-106, doi:10.15330/cmp.12.1.94-106.