Ozaki, T., Lindner, N., Hillmann, A., Link, T., & Winkelmann, W. (1997). Transarticular invasion of iliopelvic sarcomas into the sacrum: Radiological analysis of 47 cases. Acta Orthopaedica, 68(4), 381–383. https://doi.org/10.3109/17453679708996181