Lagerstedt, Lars (2014). "Märkesträd i Sverige - 10 Almar" [Notable trees in Sweden - 10 Elms] (PDF). Lustgården. 94: 55, 62, 71. Retrieved 15 May 2018.
Photographs of mature specimen of U. 'Crispa' in Krusenburg near Uppsala, from tradgardsakademin.se, 'Crispa' (right) in Serafimerparken, Stockholm [2][3]
uga.edu
fax.libs.uga.edu
Elwes, H. J. & Henry, A. (1913). The Trees of Great Britain & Ireland. Vol. VII. p.1867. Private publication, Edinburgh. [1]Archived 2008-10-05 at the Wayback Machine
web.archive.org
Elwes, H. J. & Henry, A. (1913). The Trees of Great Britain & Ireland. Vol. VII. p.1867. Private publication, Edinburgh. [1]Archived 2008-10-05 at the Wayback Machine
Photographs of mature specimen of U. 'Crispa' in Krusenburg near Uppsala, from tradgardsakademin.se, 'Crispa' (right) in Serafimerparken, Stockholm [2][3]
