@article{a05,
author = {Acock, A. C.},
title = {Working with missing values},
journal = {Journal of Marriage and Family},
year = {2005},
volume = {67},
pages = {1012-1028},
}

@conference{a12,
author = {Allison, P. D.},
title = {Handling missing data by maximum likelihood. 
booktitle = {Keynote presentation at the SAS Global Forum},
month = {April},
year = {2012},
url = {http://www.statisticalhorizons},
address = {Orlando, Florida},
}

@article{d06,
author = {Donders, A. Rogier T.},
title = {van der Heijden, Geert J},
journal = {G., Stijnen, T., & Moons, K. G. M.  Review: A gentle introduction to imputation of missing values. Journal of Clinical Epidemiology},
year = {2006},
volume = {59},
pages = {1087-1091},
}

@article{g09,
author = {Graham, J. W.},
title = {Missing data analysis: Making it work in the real world},
journal = {Annu. Rev. Psychol.},
year = {2009},
volume = {60},
pages = {549-576},
}

@article{sg02,
author = {Schafer, J. L. and Graham, J. W.},
title = {Missing data: Our view of the state of the art},
journal = {Psychological Methods},
year = {2002},
volume = {7},
number = {2},
pages = {147-177},
}

@inproceedings{t05,
author = {Truxillo, C.},
title = {Maximum likelihood parameter estimation with incomplete data},
booktitle = {Proceedings of the Thirtieth Annual SAS(r) Users Group International Conference},
year = {2005},
month = {March}
address = {Washington},
pages = {111-30},
}

@online{g,
author = {UCLA Statistical Consulting Group},
title = {Annotated SPSS Output, Factor Analysis},
year = {2014},
url = {http://www.ats.ucla.edu/stat/spss/output/factor1.htm},
urldate = {5-feb-2014},
}

@article{v04,
author = {von Hippel, Paul T.},
title = {Biases in SPSS 12.0 missing value analysis},
journal = {The American Statistician},
year = {2004},
volume = {58},
number = {2},
pages = {160-164},
}