"The ZIMLAT Telescope". Universität Bern, Astronomisches Institut, Zimmerwald Observatory. 3 August 2007. Archived from the original on 10 July 2012. Retrieved 2 September 2015.
"The ZIMLAT Telescope". Universität Bern, Astronomisches Institut, Zimmerwald Observatory. 3 August 2007. Archived from the original on 10 July 2012. Retrieved 2 September 2015.