paper.bib

@Book{wickham_ggplot,
  author = {Hadley Wickham},
  title = {ggplot2: Elegant Graphics for Data Analysis},
  publisher = {Springer-Verlag New York},
  year = {2009},
  isbn = {978-0-387-98140-6},
  url = {http://ggplot2.org},
}

@article{daniel_ludecke_2018_1249216,
  author       = {Daniel Lüdecke},
  title        = {sjlabelled: Labelled Data Utility Functions},
  month        = {May},
  year         = {2018},
  doi          = {10.5281/zenodo.1249215},
  url          = {https://doi.org/10.5281/zenodo.1249215},
  publisher    = {Zenodo}
}


@article{bremer_social_2018,
	title = {Social relationships and GP use of middle-aged and older adults in Europe: a moderator analysis},
	volume = {8},
	issn = {2044-6055, 2044-6055},
	shorttitle = {Social relationships and GP use of middle-aged and older adults in Europe},
	url = {http://bmjopen.bmj.com/lookup/doi/10.1136/bmjopen-2017-018854},
	doi = {10.1136/bmjopen-2017-018854},
	number = {4},
	urldate = {2018-04-09},
	journal = {BMJ Open},
	author = {Daniel Bremer and Daniel Lüdecke and Nico Vonneilich and Olaf von dem Knesebeck},
	month = {Apr},
	year = {2018},
	pages = {e018854}
}

@article{ludecke_for_2018,
	title = {For better or worse: Factors predicting outcomes of family care of older people over a one-year period. A six-country European study},
	volume = {13},
	issn = {1932-6203},
	shorttitle = {For better or worse},
	doi = {10.1371/journal.pone.0195294},
	number = {4},
	journal = {PloS One},
	author = {Lüdecke, Daniel and Bien, Barbara and McKee, Kevin and Krevers, Barbro and Mestheneos, Elizabeth and Di Rosa, Mirko and von dem Knesebeck, Olaf and Kofahl, Christopher},
	year = {2018},
	pmid = {29614108},
	pages = {e0195294}
}