Efstathopoulos, N. Karahalios, G.G. Agoropoulos, Z. Papachristou, G. Mantzilas, Th. Sapkas, G. Liapi, G., Pigmented villonodular synovitis of the ankle A case report, European Journal of Orthopaedic Surgery & Traumatology, (5), 119-121, 1995, Springer-Verlag, 1633-8065, 1432-1068