Kumar, D. A. H. ., Lin, A., Maguire, L. . and Kilroy, D. . (2018) “The Utility of Iris-pupillary Area Ratio as a Non-invasive Index of Stress in Primates”, Biology, Engineering, Medicine and Science Reports, 4(1), pp. 20–22. doi: 10.5530/bems.4.1.6.