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

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