On Using Conditional Rotation Operations to Adaptively Structure Binary Search Trees. - Robert P. Cheetham; B. John Oommen; David T. H. Ng (ICDT, 1988)

Adaptive Structuring of Binary Search Trees Using Conditional Rotations. - Robert P. Cheetham; B. John Oommen; David T. H. Ng (IEEE Trans. Knowl. Data Eng., 1993)