Skytting, B., Meis-Kindblom, J. M., Larsson, O., Virolainen, M., Perfekt, R., Åkerman, M., & Kindblom, L.-G. (1999). Synovial sarcoma–identification of favorable and unfavorable histologic types: A Scandinavian sarcoma group study of 104 cases. Acta Orthopaedica, 70(6), 543–554. https://doi.org/10.3109/17453679908997840