Lima M. J., Pirraco R. P., Sousa R. A., Neves N. M., Marques A. P., Bhattacharya M., Correlo V. M., and Reis R. L.,  "Bottom-up approach to construct microfabricated multi-layer scaffolds for bone tissue engineering",  Biomedical Microdevices, vol. 16, issue 1, pp. 69-78, doi:DOI 10.1007/s10544-013-9806-4, 2013.