Heat transfer analysis of fractional second-grade fluid subject to Newtonian heating with Caputo and Caputo-Fabrizio fractional derivatives: A comparisonMuhammad Imran Asjad, Nehad Ali Shah, Maryam Aleem and Ilyas KhanEur. Phys. J. Plus, 132 8 (2017) 340DOI: https://doi.org/10.1140/epjp/i2017-11606-6