1. Koenig, F., Knittel, J., & Stepp, H. (2001). Diagnosing cancer in vivo. Science, 292, 1401–1403.
2. Weissleder, R. (2006). Molecular imaging in cancer. Science, 312(5777), 1168–1171.
3. Massoud, T. F., & Gambhir, S. S. (2003). Molecular imaging in living subjects: seeing fundamental biological processes in a new light. Genes & Development, 17, 545–580.
4. Zheng, W., Harris, M., Kho, K. W., Thong, P. S., Hibbs, A., Olivo, M., et al. (2004). Confocal endomicroscopic imaging of normal and neoplastic human tongue tissue using ALA-induced-PPIX fluorescence: a preliminary study. Oncology Reports, 12, 397–401.
5. Thong, P. S. P., Olivo, M., Kho, K. W., Zheng, W., Mancer, K., Harris, M., et al. (2007). Laser confocal endomicroscopy as a novel technique for fluorescence diagnostic imaging of the oral cavity. Journal of Biomedical Optics, 12(1, 014007), 1–8.