Rutten, Matthieu J C M, B Willem Schreurs, Albert van Kampen, and H W Bart Schreuder. 1997. “Excisional Biopsy of Impalpable Soft Tissue Tumors US-Guided Preoperative Localization in 12 Cases”. Acta Orthopaedica 68 (4):384-86. https://doi.org/10.3109/17453679708996182.