D'Arcy's dissertation, which helped enormously in the making of this video: http://web.uvic.ca/~adarcy/web%20docu...
Some other papers:
https://onlinelibrary.wiley.com/doi/f...
https://onlinelibrary.wiley.com/doi/a...
https://www.jstor.org/stable/455910#m...
https://onlinelibrary.wiley.com/doi/a...
https://onlinelibrary.wiley.com/doi/a...
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