1. Stem cells in intervertebral disc regeneration–more talk than action?
   PETRA KRAUS et al, 2022, BIOCELL CrossRef
2. Cell sources proposed for nucleus pulposus regeneration
   Rebecca J. Williams et al, 2021, JOR SPINE CrossRef
3. Current Status of the Instructional Cues Provided by Notochordal Cells in Novel Disc Repair Strategies
   Ajay Matta et al, 2021, International Journal of Molecular Sciences CrossRef
4. Importance of Matrix Cues on Intervertebral Disc Development, Degeneration, and Regeneration
   Matthew J. Kibble et al, 2022, International Journal of Molecular Sciences CrossRef