Tomáš Peitl, Friedrich Slivovsky, Stefan Szeider. Proof Complexity of Fragments of Long-Distance Q-resolution. Proceedings of SAT 2019, the 22nd International Conference on Theory and Applications of Satisfiability Testing, July 7–12, 2019, Lisbon, Portugal (Mikoláš Janota, Inês Lynce, eds.), volume 11628 of Lecture Notes in Computer Science, pages 319–335, 2019, Springer Verlag.