Tupputi, Umberto, et al. “A Rare Sacral Localization of Giant Cell Tumor in a Young Adult Female: A Case Report”. Acta Biomedica Atenei Parmensis, vol. 92, no. S1, Oct. 2021, p. e2021128, https://doi.org/10.23750/abm.v92iS1.10714.