^Emsley, John (2001). Nature's Building Blocks: an A–Z guide to the elements. Oxford University Press. ISBN978-0-19-850341-5.
^Weeks, Mary Elvira (1932). "The discovery of the elements. II. Elements known to the alchemists". Journal of Chemical Education. 9 (1): 11. Bibcode:1932JChEd...9...11W. doi:10.1021/ed009p11.
^De solido intra solidum naturaliter contento 논문은 prodromus이다.
^Palmer, Alan; Veronica (1992). The Chronology of British History. London: Century Ltd. pp. 190–191. ISBN0-7126-5616-2.
^Bartholin, Erasmus (1669). Experimenta crystalli islandici disdiaclastici quibus mira & insolita refractio detegitur. Copenhagen: Daniel Paulli. 영어 번역:Werner Brandt의 놀랍고 이상한 굴절 궤적을 발견하게 된 이중 굴절 아이슬란드 결정으로 실험.1959년, 펜실베이니아 주 웨스트타운