1. Dubois-Poulsen, A.: Le champs visuel, p. 654. Paris: Masson 1952.
2. Fankhauser, F., Koch, P. Roulier, A.: On automatisation of perimetry. Albrecht v. Graefes Arch. Klin. Ophthalmol. 184, 126 (1972)
3. Fankhauser, F., Spahr, J., Bebie, H.: Three years of experience with the Octopus automated perimeter. Doc. Ophthalmologica, Proc. series, Second International Visual Field Symposium, Tübingen (1976).
4. Frankhauser, F., Spahr, J., Bebie, H.: Some aspects of the automation of perimetry. Survey of Ophthalmology 22,131(1977)
5. Fankhauser, F.: Threshold fluctuations, interpolations and spatial resolution in perimetry. Ref. at 22nd Inter. Congr. of Ophthalmol. Tokyo (1978)