Utilizing Query Facets for Search Result Navigation. - Jan Friedrich; Christoph Lindemann; Michael Petrifke (DEXA Workshops, 2015)

User Preference-Based Probability Spreading for Tag-Aware Content Recommendation. - Jan Friedrich; Christoph Lindemann; Michael Petrifke (HPCC/SmartCity/DSS, 2017)

Two-level dynamic index pruning. - Jan Friedrich; Christoph Lindemann; Michael Petrifke (ICDIM, 2017)

Evaluation of Graph-based Algorithms for Guessing User Recommendations of the Social Network Instagram. - Frank Martin Mehlhose; Michael Petrifke; Christoph Lindemann (ICSC, 2021)

Advanced techniques for ranking web documents and generating recommendations in social media. - Michael Petrifke (2022)