TY  - JOUR
T1  - A Supplementary Memoir on Caustics. 
JF  - Proceedings of the Royal Society of London (1854-1905)
VL  - 15
SP  - 268
EP  - 268
PY  - 1866/01/01/
UR  - http://dx.doi.org/10.1098/rspl.1866.0065
M3  - doi:10.1098/rspl.1866.0065
AU  - Cayley, A.
ER  -