Detection of EWS/FLI-1 by Immunostaining. An Adjunctive Tool in Diagnosis of Ewing's Sarcoma and Primitive Neuroectodermal Tumour on Cytological Samples and Paraffin-Embedded Archival Material. Nilsson G, Wang M, Wejde J, Kreicbergs A, Larsson O. Sarcoma. 1999;3(1):25-32. doi: 10.1080/13577149977839. PMID: 18521261