Papadimitriou CA, Kalofonos H, Zagouri F, Papakostas P, Bozas G, Makatsoris T, Dimopoulos M-A, Fountzilas G. Weekly docetaxel with or without gemcitabine as second-line chemotherapy in paclitaxel-pretreated patients with metastatic breast cancer: A randomized phase II study conducted by the hellenic co-operative oncology group. Oncology [Internet]. 2009;77(3-4):212 - 216.