@article{ref1,
title="An Account of Rings Consisting of All the Prismatic Colours, Made by Electrical Explosions on the Surface of Pieces of Metal",
journal="Philosophical transactions (1683-1775)",
year="1768",
author="Priestley, Joseph",
volume="58",
number="",
pages="68-74",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0260-7085",
doi="",
url="http://dx.doi.org/"
}