de Cassan, D., Sydow, S., Schmidt, N., Behrens, P., Roger, Y., Hoffmann, A., … Menzel, H. (2017). Attachment of nanoparticulate drug-release systems on poly(ε-caprolactone) nanofibers via a graftpolymer as interlayer. Colloids and Surfaces. B, Biointerfaces, 163, 309-320. https://doi.org/10.1016/j.colsurfb.2017.12.050 (Original work published 2017)

Bark, S., Piontek, T., Behrens, P., Mkalaluh, S., Varoga, D., & Gille, J. (2014). Enhanced microfracture techniques in cartilage knee surgery: Fact or fiction? World Journal of Orthopedics, 5(4), 444-9. https://doi.org/10.5312/wjo.v5.i4.444 (Original work published 2014)