TY  - JOUR
T1  - On the Differential Covariants of Plane Curves, and the Operators Employed in Their Development. 
JF  - Proceedings of the Royal Society of London (1854-1905)
VL  - 53
SP  - 420
EP  - 427
PY  - 1893/01/01/
UR  - http://dx.doi.org/10.1098/rspl.1893.0033
M3  - doi:10.1098/rspl.1893.0033
AU  - Gwyther, R.
ER  -