Horstmann G, Scharlau I, Ansorge U. More efficient rejection of happy than of angry face distractors in visual search. Psychonomic Bulletin &; Review. 2006;13(6):1067-1073.

Ansorge U, Scharlau I, Labudda K. Visual search for a motion singleton among coherently moving distractors. Psychological Research. 2006;70(2):103-116.