Ansorge, Ulrich, Gernot Horstmann, and Ingrid Scharlau. “Top–down Contingent Attentional Capture during Feed-Forward Visual Processing.” Acta Psychologica 135, no. 2 (2010): 123–26.

Uribe, David Oliva, Ralf Stroop, Tobias Hemsel, and Jörg Wallaschek. “Development of a Biomedical Tissue Differentiation System Using Piezoelectric Actuators.”https://doi.org/10.1109/FREQ.2008.4622963__In Frequency Control Symposium, 2008 IEEE International, 91–94, 2008.https://doi.org/10.1109/FREQ.2008.4622963 .