@article{glaser1968,
  title={The Discovery of Grounded Theory; Strategies for Qualitative Research},
  author={Barney G. Glaser and Anselm L. Strauss and Elizabeth Strutzel},
  year={1968},
  journal={Nursing Research},
  doi={10.1097/00006199-196807000-00014},
  url={https://doi.org/10.1097/00006199-196807000-00014}
}