Hartmann, T., Gatz, R., Wiegräbe, W., Kramer, A., Hillebrand, A., Liebermann, K., et al. (1993).
A Scanning Near-field Optical Microscope (SNOM) for Biological Applications. In Courjon, D. Pohl, & D. (Eds.),
Near Field Optics (pp. 35-44). Dordrecht: Kluwer Academic Publishers.