1. DIN EN 120. 2011. Wood-based panels: determination of formaldehyde release: extraction method (called perforator method); German version. Deutsches Institut für Normung e. V., Berlin, Germany.
2. DIN EN 310. 1993. Wood-based panels; determination of modulus of elasticity in bending and of bending strength; German version. Deutsches Institut für Normung e. V., Berlin, Germany.
3. DIN EN 317. 1993. Particleboards and fibreboards; determination of swelling in thickness after immersion in water; German version. Deutsches Institut für Normung e. V., Berlin, Germany.
4. DIN EN 323. 1993. Wood-based panels; determination of density; German version. Deutsches Institut für Normung e. V., Berlin, Germany.