"Leichtmetallbau." . . . . "Porous materials." . . "Porous materials" . "Electronic books." . . "Electronic books" . . "Numerical and experimental investigation of Hollow sphere structures in sandwich panels" . . . . . "Numerical and experimental investigation of hollow sphere structures in sandwich panels" . "Numerical and experimental investigation of hollow sphere structures in sandwich panels"@en . . . . . "Electronic books"@en . . . . "Livres électroniques" . . . . . . . . . . . . . "Honeycomb structures." . . "Honeycomb structures" . "Sandwichbauteil." . . "Sandwich construction." . . "Sandwich construction" .