Marcelo, Reinaldo. "Ree bela sono" [A beautiful sound returns]. esperanto.be (in Esperanto). Monato. Archived from the original on 24 September 2015. Retrieved 2 December 2014.
reta-vortaro.de
"dolĉamar/o, tradukoj" [dolĉamar/o, translations to other languages]. reta-vortaro.de (in Esperanto). Reta Vortaro. Retrieved 2 December 2014.
web.archive.org
Marcelo, Reinaldo. "Ree bela sono" [A beautiful sound returns]. esperanto.be (in Esperanto). Monato. Archived from the original on 24 September 2015. Retrieved 2 December 2014.