1. 1) M. F. Ashby, A. G. Evans, N. A. Fleck, L. J. Gibson, J. W. Hutchinson, H. N. G. Wadley: Metal Foams: A Design Guide, Butterworth-Heinemann, (2000) 3-5.
2. 2) N. Kanetake: Sosei to kakou, 586 (2009) 1004-1008.
3. 3) Japanese Standard Association: Compression test for porous metals and cellular metals, JIS H7902, (2008).
4. 4) Japanese Standard Association: High speed compression test for porous metals and cellular metals, JIS H7904, (2012).
5. 5) Deutsches Institut für Normung: Compression test of metallic cellular materials DIN 50134, DIN, (2008).