@article{ballard2014-24587083,
  author  = {Ballard, K. J. and Savage, S. and Leyton, C. E. and Vogel, A. P. and Hornberger, M. and Hodges, JR.},
  title   = {{Logopenic and nonfluent variants of primary progressive aphasia are differentiated by acoustic measures of speech production}},
  journal = {PloS one},
  year    = {2014},
  doi     = {10.1371/journal.pone.0089864},
  pmid    = {24587083},
  url     = {https://doi.org/10.1371/journal.pone.0089864}
}