TY  - RPRT
TI  - General Invariants of Irregular Analytic Elements.
AU  - E Kasner
AU  - J De Cicco
PY  - 1941
DO  - 10.1073/pnas.27.1.88
UR  - https://pubmed.ncbi.nlm.nih.gov/16588435/
ID  - 16588435
ER  -