TY  - JOUR
T1  - A Class of Functional Invariants
JF  - Philosophical Transactions of the Royal Society of London. A (1887-1895)
VL  - 180
SP  - 71
EP  - 118
PY  - 1889/01/01/
UR  - http://dx.doi.org/10.1098/rsta.1889.0002
M3  - doi:10.1098/rsta.1889.0002
AU  - Forsyth, A.
ER  -