@article{JMLR:v16:thon15a,
  author  = {Michael Thon and Herbert Jaeger},
  title   = {Links Between Multiplicity Automata, Observable Operator Models and Predictive State Representations -- a Unified Learning Framework},
  journal = {Journal of Machine Learning Research},
  year    = {2015},
  volume  = {16},
  number  = {4},
  pages   = {103--147},
  url     = {http://jmlr.org/papers/v16/thon15a.html}
}