Wu, Y., Wang, X., Chen, C. and Liu, G. 2022. Proof of Learning: Towards a Practical Blockchain Consensus Mechanism Using Directed Guiding Gradients (Student Abstract). Proceedings of the AAAI Conference on Artificial Intelligence. 36, 11 (Jun. 2022), 13089-13090. DOI:https://doi.org/10.1609/aaai.v36i11.21681.