Coudane, H., A. Fery, J. Sommelet, J. Lacoste, P. Leduc, and A. Gaucher. 1981. “Aseptic Loosening of Cemented Total Arthroplasties of the Hip in Relation to Positioning of the Prosthesis: New Utilization of the Tschuprow-Cramer Statistical Test”. Acta Orthopaedica 52 (2):201-5. https://doi.org/10.3109/17453678108991782.