Consistent lock-free parallel stochastic gradient descent for fast and stable convergence - Bäckström, Karl; Walulya, Ivan; Papatriantafilou, Marina; Tsigas, Philippas (35th IEEE International Parallel and Distributed Processing Symposium, IPDPS 2021, Virtual, Online Proceedings - 2021 IEEE 35th International Parallel and Distributed Processing Symposium, IPDPS 2021, 2021)