@article{superviseddictionarylearningbya,
  title = {Supervised Dictionary Learning by a Variational Bayesian Group Sparse Nonnegative Matrix Factorization},
  author = {Ivan Ivek},
  year = {2014},
  eprint = {1405.6914},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1405.6914v1},
}