Davy, Humphry (1814). "VI. Some experiments and observations on a new substance which becomes a violet coloured gas by heat". Philosophical Transactions of the Royal Society of London. 104: 74–93. doi:10.1098/rstl.1814.0007. S2CID109845199.
semanticscholar.org
api.semanticscholar.org
Davy, Humphry (1814). "VI. Some experiments and observations on a new substance which becomes a violet coloured gas by heat". Philosophical Transactions of the Royal Society of London. 104: 74–93. doi:10.1098/rstl.1814.0007. S2CID109845199.