TY  - JOUR
T1  - Invariants, Covariants, and Quotient Derivatives Associated with Linear Differential Equations. 
JF  - Proceedings of the Royal Society of London (1854-1905)
VL  - 43
SP  - 311
EP  - 316
PY  - 1887/01/01/
UR  - http://dx.doi.org/10.1098/rspl.1887.0138
M3  - doi:10.1098/rspl.1887.0138
AU  - Forsyth, A.
ER  -