V. A. Veshnyakov. "THE ACTION OF NITRIC ACID ON LIGNIN IN A WATER-DIMETHYL SULFOXIDE MIXTURE." SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 18th SGEM International Multidisciplinary Scientific GeoConference SGEM2018, Energy and Clean Technologies (2018): 127-134. https://doi.org/10.5593/sgem2018v/4.3/s05.016