Formation of double-layers and super-solitons in a six-component cometary dusty plasma Essam M. Abulwafa, Atalla M. Elhanbaly, Ahmed M. Bedeir and Abeer A. Mahmoud Eur. Phys. J. D, 76 7 (2022) 120 Published online: 11 July 2022 DOI: 10.1140/epjd/s10053-022-00450-2