Non-normal Recurrent Neural Network (nnRNN): learning long time dependencies while improving expressivity with transient dynamics - Kerg, Giancarlo; Goyette, Kyle; Puelma Touzel, Maximilian; Gidel, Gauthier; Vorontsov, Eugene; Bengio, Yoshua; Lajoie, Guillaume (Advances in Neural Information Processing Systems, 2019)