Khalifa Mohammad Helal (2021) “A FORMULATION OF THE DIFFERENTIAL CONSTITUTIVE EQUATION OF OLDROYD-B FLUID AND WRITING PROGRAMMING CODE IN FREEFEM++ TO SOLVE IT BASED ON FINITE ELEMENT METHOD CONSIDERING TWO AUXILIARY NAVIER-STOKES AND TRANSPORT PROBLEMS”, Researchers World - International Refereed Social Sciences Journal, 4(2), pp. 33–42. Available at: https://www.researchersworld.com/index.php/rworld/article/view/1029 (Accessed: 16 May 2024).