Jäschke, Robert, Hotho, Andreas, Mitzlaff, Folke and Stumme, Gerd. "Challenges in Tag Recommendations for Collaborative Tagging Systems." In Recommender Systems for the Social Web , edited by José J. Pazos Arias, Ana Fernández Vilas and Rebeca P. Díaz Redondo , 65--87. Berlin/Heidelberg: Springer, 2012.

Jäschke, Robert, Hotho, Andreas, Mitzlaff, Folke and Stumme, Gerd. "Challenges in Tag Recommendations for Collaborative Tagging Systems." In Recommender Systems for the Social Web , edited by José J. Pazos Arias, Ana Fernández Vilas and Rebeca P. Díaz Redondo , 65--87. Berlin/Heidelberg: Springer, 2012.

Jäschke, Robert, Hotho, Andreas, Mitzlaff, Folke and Stumme, Gerd. "Challenges in Tag Recommendations for Collaborative Tagging Systems." In Recommender Systems for the Social Web , edited by Janusz Kacprzyk and Lakhmi C. Jain , 65--87. Berlin/Heidelberg: Springer, 2012.

Jäschke, Robert, Hotho, Andreas, Mitzlaff, Folke and Stumme, Gerd. "Challenges in Tag Recommendations for Collaborative Tagging Systems." In Recommender Systems for the Social Web , edited by José J. Pazos Arias, Ana Fernández Vilas and Rebeca P. Díaz Redondo , 65--87. Berlin/Heidelberg: Springer, 2012.