@misc{indiciae9b6de2630f17, title = {An Improved Equal-Frequency Map of the Normal Correlation Surface, Using Circles Instead of Ellipses.}, author = {E V Huntington}, year = {1932}, doi = {10.1073/pnas.18.6.465}, url = {https://pubmed.ncbi.nlm.nih.gov/16587716/}, note = {Source identifier: 16587716} }