@article{JMLR:v18:16-270,
  author  = {Adam S. Charles and Dong Yin and Christopher J. Rozell},
  title   = {Distributed Sequence Memory of Multidimensional Inputs in Recurrent Networks},
  journal = {Journal of Machine Learning Research},
  year    = {2017},
  volume  = {18},
  number  = {7},
  pages   = {1--37},
  url     = {http://jmlr.org/papers/v18/16-270.html}
}