1. Outlier..........s;Beckman;Technometrics,1983
2. Identification of outliers;Hawkins,1980
3. Outliers in statistical data;Barnett,1994
4. Computing depth contours of bivariate point clouds;Ruts;Computational Statistics & Data Analysis,1996
5. Algorithms for mining distance-based outliers in large datasets;Knorr,1998