TY  - RPRT
TI  - Concerning Kendall's tau, a nonparametric correlation coefficient.
AU  - M S SCHAEFFER
AU  - E E LEVITT
PY  - 1956
DO  - 10.1037/h0045013
UR  - https://pubmed.ncbi.nlm.nih.gov/13336201/
ID  - 13336201
ER  -