1. Fracture toughness of wet and dry Pinus Radiata;King;Holz als Roh- und Werkstoff,1999
2. Franke B. Zur Bewertung der Tragfähigkeit von Trägerausklinkungen in Nadelholz. Doctoral dissertation, Germany: Bauhaus University Weimar; 2008.
3. Aicher S, Boström L, Gierl M, Kretschmann D, Valentin G. Determination of fracture energy of wood in mode II. Rilem TC 133 Report. Sweden: Swedish National Testing and Research Institute; 1997.
4. Valentin HG, Boström L, Gustafsson PJ, Ranta Maunus A, Gowda S. Application of fracture mechanics to timber structures RILEM state-of-the-art report. Research Notes 1262. Finland: Technical Research Centre of Finland; 1991.
5. Larsen HJ, Gustafsson PJ. The fracture energy of wood in tension perpendicular to grain, results from a joint testing project. In: Conference proceedings CIB-W18A, paper 23–19-2, Portugal; 1990.