archive.org/details/revo...
archive.org/details/revo...
www.jstor.org/stable/284483
www.jstor.org/stable/284483
www.jstor.org/stable/3748624
www.jstor.org/stable/3748624
archive.org/details/list...
archive.org/details/list...
www.jstor.org/stable/185209
www.jstor.org/stable/185209
spssi.onlinelibrary.wiley.com/doi/abs/10.1...
spssi.onlinelibrary.wiley.com/doi/abs/10.1...
www.jstor.org/stable/31297...
www.jstor.org/stable/31297...