TY  - RPRT
TI  - What is a paradigm and when does it shift?
AU  - A M Katz
AU  - L A Katz
PY  - 1991
DO  - 10.1016/0022-2828(91)90164-h
UR  - https://pubmed.ncbi.nlm.nih.gov/1942077/
ID  - 1942077
ER  -