TY  - RPRT
TI  - On some isospectral second order differential operators.
AU  - M Kac
AU  - P V Moerbeke
PY  - 1974
DO  - 10.1073/pnas.71.6.2350
UR  - https://pubmed.ncbi.nlm.nih.gov/16592161/
ID  - 16592161
ER  -