Guckenberger, R. (1998). STM-signals and imaging modes - Introduction. In R. C. J.P., A. Engel, J. Frommer, H. Gaub, A. Gerwirth, R. Guckenberger, et al. (Eds.), Procedures in Scanning Probe Microscopies (pp. 50-51). Chichester-New York: John Wiley & Sons.