1. Sound absorption by double panel factory roof constructions;Bolton,1982
2. Surface absorption and scattering in enclosures;Hodgson,1982
3. Acoustical properties of rectangular rooms of various proportions;Sergeev;Sov. Phys. Ac.,1979
4. Schallschluckung, Abschirmen und Eingrenzen von Storschall in Industrienhallen;Gabler;Schalltechnik,1961