Zhang S. H., Zhu L. X., Jin A. M., Yan L. P., Huang R., Wang J. X., and Zhu S. T.,  "In vitro culture of chondrocytes on the layered cylindric collagen/chitosan/beta-tricalcium phosphate composite scaffold",  Journal of Clinical Rehabilitative Tissue Engineering Research, vol. 12, issue 41, pp. 8033-8036, 2008.