References on muon colliders:

• Input to European Strategic Planning: arXiv:1901.06150.
• MICE: Nature 578 (2020) 7793, 53. 
• Muon Collider Forum Report: arXiv:2209.01318.
• KITP program on muon colliders: link

References on muon-ion colliders:

• Nucl. Instrum. Meth. A 1027 (2022) 166334. arXiv:2107.02073.
• Snowmass white paper: arXiv:2203.06258.

Presentations related to the muon-ion colliders:

• Snowmass workshop: link
• CIPANP2022: link
• DIS2022: link
• FNAL muon collider workshop: link