Hu, Y., Zheng, Y., Liu, H., Jiang, D., Liu, Y. and Ren, B. 2020. Accurate Structured-Text Spotting for Arithmetical Exercise Correction. Proceedings of the AAAI Conference on Artificial Intelligence. 34, 01 (Apr. 2020), 686-693. DOI:https://doi.org/10.1609/aaai.v34i01.5410.