Kamal, A. F., Hutagalung, E. U., Gumay, S., Prabowo, Y. and Yanuarso, Y. (2013) “Primary malignant giant cell tumor of the patella: report of a rare case”, Medical Journal of Indonesia, 22(4), pp. 238–42. doi: 10.13181/mji.v22i4.607.