apparently that work is outdated (or incomplete) since 2010..<p><a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Capital_%E1%BA%9E" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Capital_%E1%BA%9E</a><p>&quot;Capital sharp s (ẞ) [...] never occurs word-initially in German text, and traditional German printing (which used blackletter) never used all-caps. When using all-caps, current spelling rules require the replacement of ß with SS.[1] However, in 2010 the use of the capital sharp s became mandatory in official documentation when writing geographical names in all-caps.&quot;