TY  - RPRT
TI  - A system matrix for astigmatic optical systems: I. Introduction and dioptric power relations.
AU  - M P Keating
PY  - 1981
DO  - 10.1097/00006324-198110000-00006
UR  - https://pubmed.ncbi.nlm.nih.gov/7304708/
ID  - 7304708
ER  -