That study has been mentioned a few times in this thread already.
i) https://foot.ie/threads/178393-Discu...=1#post1879265
ii) https://foot.ie/threads/178393-Discu...84#post1904784
ii) https://foot.ie/threads/178393-Discu...=1#post1912847
I twice misattributed it to Michael Burke rather than Professor Kurt Huebner, however.
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