BoroondaraWiki:Selected anniversaries/11 August
- 1892 – Swen Nilson Wiedemann, former councillor for the Shire of Boroondara and notable local figure, is gored to death by a bull in a paddock on his property at his farm 'Colongulac' in Balwyn North.
- Poole, Marilyn. Part 1 The Wiedemann Family. Balwyn Historical Society: February 2020. http://home.vicnet.net.au/~balwynhs/newsletters/2020/BHS%20Newsletter%20Jan-Feb%202020%20Final.pdf, accessed: 2 April 2022