1. Joao Filgueiras ˜ *,Lu'ıs Barbosa* ,Gil Rocha* , Henrique Lopes Cardoso* , Lu'ıs Paulo Reis* , Joao Pedro Machado ˜ + , Ana Maria Oliveira,Complaint Analysis and Classification for Economic and Food Safety,*Laboratorio de Intelig ' encia Artificial e Ci ˆ enciade Computadores (LIACC) Faculdade deEngenhariadaUniversidade do Porto Rua Dr. Roberto Frias, s/n, 4200-465 Porto, Portugal.
2. N. S. Altman. 1992. An introduction to kernel and nearest-neighbor nonparametric regression. The American Statistician, 46(3):175-185.
3. Koray Balcı -Department of Computer Engineering, Boğaziçi University, Istanbul, Turkey
4. Albert Ali Salah -Department of Computer Engineering, Boğaziçi University, Istanbul, Turkey
5. Automatic Classification of Player Complaints in Social Games.