1. Arab, B., Gawlick, D., Radhakrishnan, V., Guo, H., Glavic, B.: A generic provenance middleware for database queries, updates, and transactions. In: TaPP (2014)
2. Bidoit, N., Herschel, M., Tzompanaki, K.: Immutably answering why-not questions for equivalent conjunctive queries. In: TaPP (2014)
3. Bidoit, N., Herschel, M., Tzompanaki, K., et al.: Query-based why-not provenance with NedExplain. In: EDBT, pp. 145–156 (2014)
4. Chapman, A., Jagadish, H.V.: Why not? In: SIGMOD, pp. 523–534 (2009)
5. Cheney, J., Chiticariu, L., Tan, W.: Provenance in databases: why, how, and where. Found. Trends Databases 1(4), 379–474 (2009)