@article{BienerSasseBoekers2006,
  author    = {Ernst Biener and T. Sasse and H. B{\"o}kers},
  title     = {Preliminary or final capping of sanitary landfills? : Technical and economical aspects},
  journal   = {Sardinia 99 : proceedings / Seventh International Waste Management and Landfill Symposium, [4 - 8 October 1999, S. Margherita di Pula, Cagliari, Sardinia, Italy]. Ed.: Thomas H. Christensen. - Bd. 3 : Barriers, waste mechanics and landfill design},
  pages     = {287 -- 294},
  year      = {2006},
}