TY  - RPRT
TI  - What is a variable?
AU  - S C Beyea
AU  - L H Nicoll
PY  - 1997
DO  - 10.1016/s0001-2092(06)62696-3
UR  - https://pubmed.ncbi.nlm.nih.gov/9293332/
ID  - 9293332
ER  -