Ding, C., Liu, K., Korhonen, J. and Belyaev, E. 2021. Spatio-Temporal Difference Descriptor for Skeleton-Based Action Recognition. Proceedings of the AAAI Conference on Artificial Intelligence. 35, 2 (May 2021), 1227-1235. DOI:https://doi.org/10.1609/aaai.v35i2.16210.