@article{WeinholdWegenerKuenstleretal.2000,
  author    = {Till Weinhold and Michael Wegener and Wolfgang K{\"u}nstler and Martin Seiß and Thomas G{\"o}rne and Reimund Gerhard},
  title     = {Porous polytetrafluoroethylene (PTFE) single-film space-charge electrets with high piezoelectric coefficients},
  year      = {2000},
}