@misc{KaulardCunninghamBuelthoffetal., author = {Kaulard, Kathrin and Cunningham, Douglas W. and B{\"u}lthoff, Heinrich H. and Wallraven, Christian}, title = {The MPI facial expressions database - A validated database of emotional and conversational facial expressions}, series = {PLoS one}, volume = {7}, journal = {PLoS one}, number = {3}, issn = {1932-6203}, pages = {1 -- 18}, language = {en} }