Readers should cite both the Bio-protocol preprint and the original research article where this protocol was used:

Chen, D, Wu, J and Vunjak-Novakovic, G(2021). Cultivation of the cartilage layer. Bio-protocol Preprint. bio-protocol.org/prep1313.
Chen, D., Wu, J. Y., Kennedy, K. M., Yeager, K., Bernhard, J. C., Ng, J. J., Zimmerman, B. K., Robinson, S., Durney, K. M., Shaeffer, C., Vila, O. F., Takawira, C., Gimble, J. M., Guo, X. E., Ateshian, G. A., Lopez, M. J., Eisig, S. B. and Vunjak-Novakovic, G.(2020). Tissue engineered autologous cartilage-bone grafts for temporomandibular joint regeneration . Science Translational Medicine 12(565). DOI: 10.1126/scitranslmed.abb6683