Mac, I.: Tectogeomorphologic Geometamorphoses in Northwestern Romania - the Silvania Mountains [online]. [Cit. 2013-03-31]. Dostupné online. Archivované 2015-01-07 z originálu.
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Mac, I.: Tectogeomorphologic Geometamorphoses in Northwestern Romania - the Silvania Mountains [online]. [Cit. 2013-03-31]. Dostupné online. Archivované 2015-01-07 z originálu.