1. Identification of Outliers, Vol. 11;Hawkins,1980
2. Fast computation of 2-dimensional depth contours;Johnson,1998
3. A comparative study of RNN for outlier detection in data mining;Williams,2002
4. Robust estimates, residuals, and outlier detection with multiresponse data;Gnanadesikan;Biometrics,1972
5. Outlier Analysis;Aggarwal,2017