TY  - JOUR
T1  - Symmetrisable Functions and Their Expansion in Terms of Biorthogonal Functions
JF  - Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character (1905-1934)
VL  - 97
IS  - 686
SP  - 401
EP  - 413
PY  - 1920/07/01/
UR  - http://dx.doi.org/10.1098/rspa.1920.0041
M3  - doi:10.1098/rspa.1920.0041
AU  - Mercer, J.
ER  -