These are two excellent research articles, with legal precedent that can be used to demand a judge recuse themselves.
VILLANOVA LAW REVIEW
http://www.pacourtwatch.com/wp-content/uploads/2015/01/RECUSAL-ARTICLE-LAW-JOURNAL.pdf
TEMPLE UNIVERSITY LAW REVIEW
http://www.pacourtwatch.com/wp-content/uploads/2015/01/RECUSAL-ARTICLE-LAW-JOURNAL.pdf
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