E. Sood, S. Tannert, P. Mueller, and A. Bulling. Advances in Neural Information Processing Systems, 33, page 6327--6341. Curran Associates, Inc., (2020)
R. Diestelkämper, and M. Herschel. In Proceedings of the Conference on Advances in Databases and Information Systems (ADBIS), page 171-186. Springer, (2020)