TY  - RPRT
TI  - Note on a Canonical Form for the Linear q-Difference System.
AU  - G D Birkhoff
AU  - P E Guenther
PY  - 1941
DO  - 10.1073/pnas.27.4.218
UR  - https://pubmed.ncbi.nlm.nih.gov/16578011/
ID  - 16578011
ER  -