TY  - RPRT
TI  - Completely Integrable Differential Equations in Abstract Spaces.
AU  - A D Michal
AU  - V Elconin
PY  - 1935
DO  - 10.1073/pnas.21.9.534
UR  - https://pubmed.ncbi.nlm.nih.gov/16577684/
ID  - 16577684
ER  -