Exact solutions of Kudryashov–Sinelshchikov equation using two analytical techniques Hamood Ur Rehman, Naeem Ullah and M. A. Imran Eur. Phys. J. Plus, 136 6 (2021) 647 Published online: 09 June 2021 DOI: 10.1140/epjp/s13360-021-01589-4