1. Calvo EG, Arenillas A, Menéndez JÁ (2011) Designing nanostructured carbon xerogels. Intech Open Access Publisher
2. Rey-Raap N, Arenillas A, Menéndez JA (2015) Formaldehyde in the synthesis of resorcinol-formaldehyde carbon gels. In: Patton A (ed) Formaldehyde: synthesis, applications and potential health effects. Nova Science
3. Pekala RW (1989) Low density, resorcinol-formaldehyde aerogels. US patent 4873218
4. Droege MW (1999) Low density open cell organic foams, low density open cell carbon foams, and methods for preparing same. US patent 5945084
5. Rey-Raap N, Menéndez JA, Arenillas A (2014) RF xerogels with tailored porosity over the entire nanoscale. Microporous Mesoporous Mater 195:266–275