1. Christian Beecks and Max Berrendorf. 2018. Optimal k-Nearest-Neighbor Query Processing via Multiple Lower Bound Approximations. In IEEE International Conference on Big Data, Big Data 2018, Seattle, WA, USA, December 10--13, 2018, Naoki Abe, Huan Liu, Calton Pu, Xiaohua Hu, Nesreen Ahmed, Mu Qiao, Yang Song, Donald Kossmann, Bing Liu, Kisung Lee, Jiliang Tang, Jingrui He, and Jeffrey Saltz (Eds.). IEEE, 614--623. https://doi.org/10.1109/BigData.2018.8622493
2. Christian Beecks and Alexander Graß. 2016. Multi-step threshold algorithm for efficient feature-based query processing in large-scale multimedia databases. In 2016 IEEE International Conference on Big Data, BigData 2016, Washington DC, USA, December 5--8, 2016, James Joshi, George Karypis, Ling Liu, Xiaohua Hu, Ronay Ak, Yinglong Xia, Weijia Xu, Aki-Hiro Sato, Sudarsan Rachuri, Lyle H. Ungar, Philip S. Yu, Rama Govindaraju, and Toyotaro Suzumura (Eds.). IEEE Computer Society, 596--605. https://doi.org/10.1109/BigData.2016.7840652
3. Claudiu Cobârzan, Klaus Schoeffmann, Werner Bailer, Wolfgang Hürst, Adam Blavz ek, Jakub Lokovc, Stefanos Vrochidis, Kai Uwe Barthel, and Luca Rossetto. 2017. Interactive video search tools: a detailed analysis of the video browser showdown 2015. Multimedia Tools and Applications, Vol. 76, 4 (01 Feb 2017), 5539--5571. https://doi.org/10.1007/s11042-016--3661--2
4. Cathal Gurrin, Klaus Schoeffmann, Hideo Joho, Duc-Tien Dang-Nguyen, Michael Riegler, and Luca Piras (Eds.). 2018. Proceedings of the 2018 ACM Workshop on The Lifelog Search Challenge, LSC@ICMR 2018, Yokohama, Japan, June 11, 2018. ACM. http://dl.acm.org/citation.cfm?id=3210539
5. Cathal Gurrin, Klaus Schoeffmann, Hideo Joho, Andreas Leibetseder, Liting Zhou, Aaron Duane, Duc-Tien Dang-Nguyen, Michael Riegler, Luca Piras, Minh-Triet Tran, et almbox. 2019 a. [Invited papers] Comparing Approaches to Interactive Lifelog Search at the Lifelog Search Challenge (LSC2018). ITE Transactions on Media Technology and Applications, Vol. 7, 2 (2019), 46--59.