Bleckman, R. F., Acem, I., van Praag, V. M., Dorleijn, D. M., Verhoef, C., Schrage, Y. M., Haas, R. M., van de Sande, M. A., the collaborative Persarc research group, , , , Bonenkamp, H., van Ginkel, R. J., Grünhagen, D. J., Jeys, L. M., Keller, J., Styring, E., Szkandera, J., & Zaikova, O. (2022). multimodality treatment of undifferentiated pleomorphic soft tissue sarcoma of the extremity (eUPS) in the elderly. European journal of surgical oncology, 48(5), 985–993. http://access.bl.uk/ark:/81055/vdc_100155022014.0x00002d