TY  - RPRT
TI  - The two by two diagram: a graphical truth table.
AU  - K M Johnson
PY  - 1999
DO  - 10.1016/s0895-4356(99)00087-6
UR  - https://pubmed.ncbi.nlm.nih.gov/10527001/
ID  - 10527001
ER  -