ActiveMath: A generic and adaptive web-based learning environment E Melis, E Andres, J Budenbender, A Frischauf, G Goduadze, P Libbrecht, ... | 429 | 2001 |

Semantic‐aware components and services of ActiveMath E Melis, G Goguadze, M Homik, P Libbrecht, C Ullrich, S Winterstein British Journal of Educational Technology 37 (3), 405-423, 2006 | 120 | 2006 |

Knowledge representation and management in activemath E Melis, J Büdenbender, G Goguadze, P Libbrecht, C Ullrich Annals of Mathematics and Artificial Intelligence 38 (1-3), 47-64, 2003 | 64 | 2003 |

Methods to access and retrieve mathematical content in activemath P Libbrecht, E Melis International Congress on Mathematical Software, 331-342, 2006 | 62 | 2006 |

Mathematical markup language (MathML) version 3.0 R Ausbrooks, S Buswell, D Carlisle, G Chavchanidze, S Dalmas, S Devitt, ... Tech. rep. World Wide Web Consortium (W3C), 2010. url: http://www. w3. org …, 2010 | 43 | 2010 |

Authoring presentation for OpenMath S Manzoor, P Libbrecht, C Ullrich, E Melis International Conference on Mathematical Knowledge Management, 33-48, 2005 | 33 | 2005 |

Interoperable interactive geometry for europe-first technological and educational results and future challenges of the intergeo project U Kortenkamp, A Blessing, C Dohrmann, Y Kreis, P Libbrecht, C Mercat | 30 | 2009 |

Math-bridge: Closing gaps in european remedial mathematics with technology-enhanced learning S Sosnovsky Mit werkzeugen mathematik Und stochastik lernen–using tools for learning …, 2014 | 29 | 2014 |

Adaptive course generation and presentation J Siekmann, C Benzmuller, A Fiedler, A Franke, G Goguadze, H Horacek, ... Proceedings of ITS-2000 workshop on Adaptive and Intelligent Web-Based …, 2000 | 27 | 2000 |

Cross-curriculum search for intergeo P Libbrecht, C Desmoulins, C Mercat, C Laborde, M Dietrich, M Hendriks International Conference on Intelligent Computer Mathematics, 520-535, 2008 | 26 | 2008 |

A flexible and efficient presentation-architecture for adaptive hypermedia: Description and technical evaluation C Ullrich, P Libbrecht, S Winterstein, M Muhlenbrock IEEE International Conference on Advanced Learning Technologies, 2004 …, 2004 | 25 | 2004 |

Activemath: system description E Melis, E Andres, A Franke, G Goguadse, P Libbrecht, M Pollet, C Ullrich Artificial Intelligence in Education 68, 580-582, 2001 | 23 | 2001 |

Specification, authoring and prototyping of personalised workplace learning solutions P Dolog, M Kravcik, A Cristea, D Burgos, P Bra, S Ceri, V Devedzic, ... International Journal of Learning Technology 3 (3), 286-308, 2007 | 22 | 2007 |

Culturally aware mathematics education technology E Melis, G Goguadze, P Libbrecht, C Ullrich Handbook of research on culturally-aware information technology …, 2011 | 21 | 2011 |

The freedom to extend openmath and its utility JH Davenport, P Libbrecht Mathematics in Computer Science 2 (2), 379-398, 2008 | 21 | 2008 |

Cross curriculum search through the GeoSkills Ontology P Libbrecht Proceedings of SEAM 8, 38-50, 2008 | 20 | 2008 |

Adaptations to a Learning Resource. P Libbrecht Acta Didactica Napocensia 8 (1), 67-74, 2015 | 19 | 2015 |

Culturally adapted mathematics education with ActiveMath E Melis, G Goguadze, P Libbrecht, C Ullrich AI & society 24 (3), 251-265, 2009 | 19 | 2009 |

ACTIVEMATH-a Learning Platform With Semantic Web Features. E Melis, G Goguadze, P Libbrecht, C Ullrich Semantic Web technologies for e-Learning 4, 159-177, 2009 | 18 | 2009 |

Notations around the world: census and exploitation P Libbrecht International Conference on Intelligent Computer Mathematics, 398-410, 2010 | 16 | 2010 |