@article{Ng2025J1,
  author = {Seyed Mohammad Sheikholeslami and Pai Chet Ng and Konstantinos N. Plataniotis},
  title = {Hierarchical Multimodal Federated Learning Over Cell-Free Massive MIMO Systems},
  year = {2025},
  journal = {IEEE Open Journal of the Communications Society},
  volume = {6},
  pages = {8111--8127},
  publisher = {Institute of Electrical and Electronics Engineers (IEEE)},
  doi = {10.1109/OJCOMS.2025.3614440},
  url = {https://doi.org/10.1109/OJCOMS.2025.3614440}
}