Konwar L.J., Sugano Y., Chutia R.S., Shchukarev A., Mäki-Arvela P., Kataki R., Mikkola J.-P. Sustainable synthesis of N and P co-doped porous amorphous carbon using oil seed processing wastes. 2016. Materials Letters. 173. 145-148. 10.1016/j.matlet.2016.03.032.