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Paul C. Sereno, Basal Archosaurs: Phylogenetic Relationships and Functional Implications, Memoir (Society of Vertebrate Paleontology), Vol. 2, Basal Archosaurs: Phylogenetic Relationships and Functional Implications (Dec. 31, 1991), pp. 1-53
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Paul C. Sereno (1991) studied this question.
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