Kristensen, Kristian D., Niels W. Pedersen, Thomas Kiæer, and Henrik Starklint. 1991. “Core Decompression in Femoral Head Osteonecrosis: 18 Stage I Hips Followed up for 1–5 Years”. Acta Orthopaedica 62 (2):113-14. https://doi.org/10.3109/17453679108999235.