@article{GerhardtSzepSchroederSchichtelZueckeretal.2017,
  author    = {Susanne Gerhardt-Sz{\´e}p and Elke Schr{\"o}der-Schichtel and Quanita Z{\"u}cker and Tugba Zahn and Stefanie Feierabend and Stefan R{\"u}ttermann},
  title     = {Problems of direct composite posterior restorations : a clinical study},
  journal   = {Journal of dental problems and solutions},
  volume    = {3},
  number    = {1},
  pages     = {035 -- 039},
  doi       = {10.17352/2394-8418.000032},
  year      = {2017},
}