id: 70104172 dt: a an: 70104172 au: Platos, Jan; Snásel, Václav; Krömer, Pavel; Abraham, Ajith ti: Detecting insider attacks using non-negative matrix factorization so: IAS, 693-696 (2009). py: 2009 pu: la: EN cc: ut: ci: li: doi:10.1109/IAS.2009.262