Dupont, S., Marchal, JM., & Crochet, M. (1985). Finite-element Simulation of Viscoelastic Fluids of the Integral Type. Journal of Non-Newtonian Fluid Mechanics, 17(2), 157-183. https://doi.org/10.1016/0377-0257(85)80013-6 (Original work published 1985)