@article{forecastingmethodforgroupedtimeseries,
  title = {Forecasting Method for Grouped Time Series with the Use of k-Means Algorithm},
  author = {N. N. Astakhova and L. A. Demidova and E. V. Nikulchev},
  year = {2015},
  eprint = {1509.04705},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1509.04705v1},
}