On degree-dependent topological study of line graph of some antiviral COVID-19 drugs Shibsankar Das, Arti Kumari and Jayjit Barman Eur. Phys. J. E, 48 6-7 (2025) 39 Published online: 14 July 2025 DOI: 10.1140/epje/s10189-025-00503-5