Hartmann, T., Gatz, R., Wiegräbe, W., Kramer, A., Hillebrand, A., Liebermann, K., Baumeister, W., & Guckenberger, R. (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.