Analysis of the dynamics of hepatitis E virus using the Atangana-Baleanu fractional derivative D. G. Prakasha, P. Veeresha and Haci Mehmet Baskonus Eur. Phys. J. Plus, 134 5 (2019) 241 Published online: 30 May 2019 DOI: 10.1140/epjp/i2019-12590-5