@article{GruetersBlankDuerkopetal.2007,
  author    = {Hugo Gr{\"u}ters and K. Blank and D. D{\"u}rkop and M. Durchholz},
  title     = {Strength tests of flat glass by means of four-point bending. Blank, K.; D{\"u}rkop, D.; Durchholz, M.; Gr{\"u}ters, H.},
  journal   = {Glastechnische Berichte. Glass science and technology. 67 (1994), H. 1},
  pages     = {9 -- 15},
  year      = {2007},
}