Artificial neural networking estimation of skin friction coefficient at cylindrical surface: a Casson flow fieldKhalil Ur Rehman, Wasfi Shatanawi and Andaç Batur ÇolakEur. Phys. J. Plus, 138 1 (2023) 69DOI: https://doi.org/10.1140/epjp/s13360-023-03704-z