Shadows and quasinormal modes of the Bardeen black hole in cloud of strings Bijendra Kumar Vishvakarma, Dharm Veer Singh and Sanjay Siwach Eur. Phys. J. Plus, 138 6 (2023) 536 Published online: 16 June 2023 DOI: 10.1140/epjp/s13360-023-04174-z