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Jonas, Ludwig; Jaksch, Heiner; Zellmann, Erhard; Klemm, Kerstin I.; Andersen, Peter Hvilshøj (2012). "Detection of mercury in the 411-year-old beard hairs of the astronomer Tycho Brahe by elemental analysis in electron microscopy". Ultrastructural Pathology. 36 (5): 312–319. doi:10.3109/01913123.2012.685686. PMID23025649. S2CID21440099.
Bricka 1888, p. 608. Bricka, Carl Frederik (1888). "Tycho Brahe". Dansk Biografisk Lexikon. Vol. II. Beccau – Brandis.{{cite book}}: CS1 maint: location missing publisher (link)
Jonas, Ludwig; Jaksch, Heiner; Zellmann, Erhard; Klemm, Kerstin I.; Andersen, Peter Hvilshøj (2012). "Detection of mercury in the 411-year-old beard hairs of the astronomer Tycho Brahe by elemental analysis in electron microscopy". Ultrastructural Pathology. 36 (5): 312–319. doi:10.3109/01913123.2012.685686. PMID23025649. S2CID21440099.