@article{JJS14,
 author = {Janetzko, Halldor and Jäckle, Dominik and Schreck, Tobias},
 journal = {International Journal On Advances in Intelligent Systems},
 number = {1 and 2},
 pages = {237--246},
 publisher = {International Academy, Research, and Industry Association (IARIA)},
 title = {Geo-Temporal Visual Analysis of Customer Feedback Data Based on Self-Organizing Sentiment Maps},
 volume = {7},
 year = {2014}
}