TY  - JOUR
T1  - On the Calculus of Symbols.--Fourth Memoir. With Applications to the Theory of Non-Linear Differential Equations
JF  - Proceedings of the Royal Society of London (1854-1905)
VL  - 13
SP  - 423
EP  - 432
PY  - 1863/01/01/
UR  - http://dx.doi.org/10.1098/rspl.1863.0087
M3  - doi:10.1098/rspl.1863.0087
AU  - Russell, W.
ER  -