Chen, L., Z. Guan, Q. Xu, Q. Zhang, H. Sun, G. Lu, and D. Cai. “Question-Driven Purchasing Propensity Analysis for Recommendation”. Proceedings of the AAAI Conference on Artificial Intelligence, vol. 34, no. 01, Apr. 2020, pp. 35-42, doi:10.1609/aaai.v34i01.5331.