Bomanson, J., T. Janhunen, and A. Weinzierl. “Enhancing Lazy Grounding With Lazy Normalization in Answer-Set Programming”. Proceedings of the AAAI Conference on Artificial Intelligence, vol. 33, no. 01, July 2019, pp. 2694-02, doi:10.1609/aaai.v33i01.33012694.