1. Pekala RW. Low density resorcinol–formaldehyde aerogels. US Patent 4997804, 1991.
2. Preparation and properties of resorcinol–formaldehyde organic and carbon gels;Al Muhtaseb;Adv Mater,2003
3. Texture control of freeze-dried resorcinol–formaldehyde gels;Kocklenberg;J Non-Cryst Solids,1998
4. Mayer ST, Pekala RW. Method of low pressure and/or evaporative drying of aerogel. US Patent 5420168, WO 9422943, 1993.
5. Pirard JP, Pirard R, Job N. Porous carbon material. Patent WO 03/026048 A1, 2003.