@misc{indiciae0a3f36024764,
  title = {A "nonnegative PCA" algorithm for independent component analysis.},
  author = {Mark D Plumbley and Erkki Oja},
  year = {2004},
  doi = {10.1109/tnn.2003.820672},
  url = {https://pubmed.ncbi.nlm.nih.gov/15387248/},
  note = {Source identifier: 15387248}
}