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