Radek Oslejsek, Vít Rusnák, Karolína Burská, Valdemar Svábenský, Jan Vykopal. Visual Feedback for Players of Multi-Level Capture the Flag Games: Field Usability Study. In Robert Gove, Dustin Arendt, Jörn Kohlhammer, Marco Angelini, Celeste Lyn Paul, Chris Bryan, Sean McKenna, Nicolas Prigent, Parnian Najafi, Awalin Sopan, editors, IEEE Symposium on Visualization for Cyber Security, VizSec 2019, Vancouver, BC, Canada, October 23, 2019. pages 1-11, IEEE, 2019. [doi]