MUHAMMAD MUJTABA SHAIKH, KASHIF MEMON, SARA MAHESAR and OWAIS ALI RAJPUT 2025. A Theoretical Analysis of Simpson’s 1/3-Type Scheme for the Riemann-Stieltjes Integral Based on Geometric Mean Derivative . Sindh University Research Journal - SURJ (Science Series). 57, 1 (Jul. 2025), 1–13. DOI:https://doi.org/10.26692/surjss.v57i1.7711.