TY  - RPRT
TI  - Linear Operations among Summable Functions.
AU  - N Dunford
AU  - B J Pettis
PY  - 1939
DO  - 10.1073/pnas.25.10.544
UR  - https://pubmed.ncbi.nlm.nih.gov/16588302/
ID  - 16588302
ER  -