National Fire Protection Association (2005), "Glossary: Spark", User's manual for NFPA 921, Jones & Bartlett Learning, p. 411, ISBN978-0-7637-4402-1, archived from the original on 2017-12-16
Lederle, Felix; Koch, Jannis; Hübner, Eike G. (21 February 2019). "Colored Sparks". European Journal of Inorganic Chemistry. 2019 (7): 928–937. doi:10.1002/ejic.201801300. S2CID104449284.
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National Fire Protection Association (2005), "Glossary: Spark", User's manual for NFPA 921, Jones & Bartlett Learning, p. 411, ISBN978-0-7637-4402-1, archived from the original on 2017-12-16