Temporal instability of a power-law viscoelastic nanofluid layer Mukesh Kumar Awasthi, Ziya Uddin and Rishi Asthana Eur. Phys. J. Spec. Top., 230 5 (2021) 1427-1434 Published online: 09 April 2021 DOI: 10.1140/epjs/s11734-021-00038-8