1. DIAB. ProBalsa Technical Manual, 10.00. DIAB AB, Box 201, S-312 22 Laholm, Sweden (also available at www.diabgroup.com/DIAB/filecabinet.nsf/LookupFiles/ProBalsa_Man/$file/ProBalsaMan.pdf), 2001.
2. Baltek. Baltek Product Data Sheet: Selects-End Grain Balsa Core Sheets. Baltek Corporation, PO Box 195 Northvale, NJ 07647, USA (also available, with slightly different property data, at www.baltek.com/data/tables/select_egbdata.html), 2001.
3. DIAB. Divinycell H-Grade Technical Manual, 10.00. DIAB AB, Box 201, S-312 22 Laholm, Sweden (also available at www.diabgroup.com/DIAB/filecabinet.nsf/LookupFiles/H_Man_M/$file/HManM.pdf), 2001.
4. The buckling of sandwich-type panels;Hoff;Journal of Aeronautical Sciences,1945
5. Doyle DV, Drow JT, McBurney RS. Elastic Properties of Wood: The Young's Moduli, Moduli of Rigidity, and Poisson's Ratios of Balsa and Quipo, Report No. 1528, Forest Products Laboratory, Madison, Wisconsin, 1945.