M. Kuznetsov, M. Nikishova, and A. Belova. IntelliSys (2), volume 1038 of Advances in Intelligent Systems and Computing, page 606-618. Springer, (2019)
J. Poelmans, P. Elzinga, G. Dedene, S. Viaene, and S. Kuznetsov. Proceedings of the 19th International Conference on Conceptual Structures (ICCS 2011), volume 6828 of Lecture Notes in Computer Science, page 201-214. Springer, (2011)