TY  - JOUR
T1  - On the Double Tangents of a Plane Curve
JF  - Philosophical Transactions of the Royal Society of London (1776-1886)
VL  - 149
SP  - 193
EP  - 212
PY  - 1859/01/01/
UR  - http://dx.doi.org/10.1098/rstl.1859.0011
M3  - doi:10.1098/rstl.1859.0011
AU  - Cayley, A.
ER  -