@misc{indiciae8772e3254b55,
  title = {Understanding the challenges of e-learning.},
  author = {Diane M Billings},
  year = {2007},
  doi = {10.1097/00152193-200701001-00007},
  url = {https://pubmed.ncbi.nlm.nih.gov/17197912/},
  note = {Source identifier: 17197912}
}