Abdullah Karami, Shaban Sedghi, and Zoran D. Mitrovi´c. “Some Coupled Fixed Point Results for Rational Type Contraction Mappings in \(S\)-Metric Spaces”. Malaya Journal of Matematik, vol. 8, no. 04, Oct. 2020, pp. 2012-20, doi:10.26637/MJM0804/0117.