Rutten, M. J. C. M., Schreurs, B. W., van Kampen, A., & Schreuder, H. W. B. (1997). Excisional biopsy of impalpable soft tissue tumors US-guided preoperative localization in 12 cases. Acta Orthopaedica, 68(4), 384–386. https://doi.org/10.3109/17453679708996182