EEG-Based Drivers' Drowsiness Monitoring Using a Hierarchical Gaussian Mixture Model. - Roman Rosipal; Björn Peters; Göran Kecklund; Torbjörn Åkerstedt; Georg Gruber; Michael Woertz; Peter Anderer; Georg Dorffner (HCI (16), 2007)

Detecting Driver Sleepiness Using Optimized Nonlinear Combinations of Sleepiness Indicators. - David Sandberg; Torbjörn Åkerstedt; Anna Anund; Göran Kecklund; Mattias Wahde (IEEE Trans. Intell. Transp. Syst., 2011)