TY  - RPRT
TI  - Some Remarks Concerning Schrödinger's Wave Equation.
AU  - G D Birkhoff
PY  - 1933
DO  - 10.1073/pnas.19.3.339
UR  - https://pubmed.ncbi.nlm.nih.gov/16577521/
ID  - 16577521
ER  -