 | | Collenberg, Adolf. Siegrist, Gottlieb [Götti]. En: Lexicon istoric retic (bio.). Versiun da stampa 2008.
| | Link | | | | | Collenberg, Adolf. Aviatica. En: Lexicon istoric retic (tem.). Versiun da stampa 2008.
| | Link | | |  | | Küng, Roland. Gottfried Siegrist – il pionier da l’aviatica grischuna festivescha ses 100avel anniversari. En: La Quotidiana 29-11-2000, p. 13.
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