“Invariant Solution of Viscoelastic Fluid Flow in Channels Without Porous Media Attached With Constitutive Model of Oldroyd–B Resolved By Symmetry Method”. Sindh University Research Journal - SURJ (Science Series) 49, no. 1 (January 18, 2021). Accessed October 23, 2026. https://sujo.usindh.edu.pk/index.php/SURJ/article/view/2956.