@article{onlinehumanactivityrecognitionemploying,
  title = {Online Human Activity Recognition Employing Hierarchical Hidden Markov Models},
  author = {Parviz Asghari and Elnaz Soelimani and Ehsan Nazerfard},
  year = {2019},
  eprint = {1903.04820},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1903.04820v1},
}