Soliton solutions to the DNA Peyrard–Bishop equation with beta-derivative via three distinctive approachesAsim Zafar, Khalid K. Ali, M. Raheel, Numan Jafar and Kottakkaran Sooppy NisarEur. Phys. J. Plus, 135 9 (2020) 726DOI: https://doi.org/10.1140/epjp/s13360-020-00751-8