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.
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.