Fioretto, F., T. W. Mak, and P. Van Hentenryck. “Predicting AC Optimal Power Flows: Combining Deep Learning and Lagrangian Dual Methods”. Proceedings of the AAAI Conference on Artificial Intelligence, vol. 34, no. 01, Apr. 2020, pp. 630-7, doi:10.1609/aaai.v34i01.5403.