New fractal functions on the sphere Md. Nasim Akhtar, M. Guru Prem Prasad, M. A. Navascués and R. N. Mohapatra Eur. Phys. J. Spec. Top., 230 21-22 (2021) 3755-3764 Published online: 01 December 2021 DOI: 10.1140/epjs/s11734-021-00321-8