Gerhard Brewka, Jörg Pührer, Stefan Woltran. Multi-valued GRAPPA. In Francesco Calimeri, Nicola Leone, Marco Manna, editors, Logics in Artificial Intelligence - 16th European Conference, JELIA 2019, Rende, Italy, May 7-11, 2019, Proceedings. Volume 11468 of Lecture Notes in Computer Science, pages 85-101, Springer, 2019. [doi]