TY  - JOUR
T1  - On an Extended Form of the Index Symbol in the Calculus of Operations
JF  - Philosophical Transactions of the Royal Society of London (1776-1886)
VL  - 150
SP  - 13
EP  - 42
PY  - 1860/01/01/
UR  - http://dx.doi.org/10.1098/rstl.1860.0003
M3  - doi:10.1098/rstl.1860.0003
AU  - Spottiswoode, W.
ER  -