König, D. ., Oesser, S. ., Scharla, S. ., Zdzieblik, D. ., & Gollhofer, A. . (2018). Specific Collagen Peptides Improve Bone Mineral Density and Bone Markers in Postmenopausal Women-A Randomized Controlled Study. Nutrients, 10(1). https://doi.org/10.3390/nu10010097 (Original work published 2018)

Gruber, M. ., König, D. ., Holzhäuser, J. ., Castillo, D. ., , Jahn, R. ., … Werneck, H. . Parental feeding practices and the relationship with parents in female adolescents and young adults with eating disorders: A case control study. PloS One, 15(11), e0242518. https://doi.org/10.1371/journal.pone.0242518 (Original work published 2020)