Advancing Federated Learning: A Systematic Literature Review of Methods, Challenges, and Applications. - Tamanna Zubairi Sana; Shahab A. Abdulla; Anindya Nag; Ayontika Das; Md. Mehedi Hassan; Zoya Zubairi Fiza; Asif Karim; Sheikh Ridwan Raihan Kabir (IEEE Access, 2025)