Karalis, Nikolaos, Alexander Bigerl, Liss Heidrich, Mohamed Sherif, and Axel-Cyrille Ngonga Ngomo. “Efficient Evaluation of Conjunctive Regular Path Queries Using Multi-Way Joins.” In ESWC, 2024.

Ngonga Ngomo, Axel-Cyrille, Caglar Demir, N’Dah Jean Kouagou, Stefan Heindorf, Nikoloas Karalis, and Alexander Bigerl. “Class Expression Learning with Multiple Representations.” In Compendium of Neurosymbolic Artificial Intelligence, 272–286. IOS Press, 2023.

Bigerl, Alexander, Felix Conrads, Charlotte Behning, Mohamed Ahmed Sherif, Muhammad Saleem, and Axel-Cyrille Ngonga Ngomo. “Tentris - A Tensor-Based Triple Store.”https://doi.org/10.1007/978-3-030-62419-4‑4__In The Semantic Web - ISWC 2020 - 19th International Semantic Web Conference, Athens, Greece, November 2-6, 2020, Proceedings, Part I, edited by Jeff Z. Pan, Valentina A. M. Tamma, Claudia d’Amato, Krzysztof Janowicz, Bo Fu, Axel Polleres, Oshani Seneviratne, and Lalana Kagal, 12506:56–73. Lecture Notes in Computer Science. Springer, 2020.https://doi.org/10.1007/978-3-030-62419-4‑4 .

Bigerl, Alexander, Felix Conrads, Charlotte Behning, Mohamed Sherif, Muhammad Saleem, and Axel-Cyrille Ngonga Ngomo. “Tentris – A Tensor-Based Triple Store.” The Semantic Web -- ISWC 2020, 2020.