TY  - JOUR
AU  - Lorentzon, R
AU  - Larsson, SE
AU  - Boquist, L
DO  - doi:10.1302/0301-620X.61B2.285933
UR  - https://doi.org/10.1302/0301-620X.61B2.285933
TI  - Extra-osseous osteosarcoma: a clinical and histopathological study of four cases
T2  - The Journal of Bone & Joint Surgery British Volume
VL  - 61-B
IS  - 2
PY  - 1979
SP  - 205
EP  - 208
ER  -