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Wolf, Robert J., Robert Foerster, Thomas Bruckner, Tilman Bostel, Ingmar Schlampp, Juergen Debus, Harald Rief, e German Bone Research Group. "Survival and Prognostic Factors in Patients With Stable and Unstable Spinal Bone Metastases From Solid Tumors: A Retrospective Analysis of 915 Cases." BMC Cancer 2016.

Wolf, Robert J., et al. "Survival and Prognostic Factors in Patients With Stable and Unstable Spinal Bone Metastases From Solid Tumors: A Retrospective Analysis of 915 Cases." BMC Cancer 2016.