Lda Costa Sousa, Foston, M., Bokade, V. V., Azarpira, A., Lu, F., Ragauskas, A. J., Ralph, J., Dale, B. E., and Balan, V., ?Isolation and characterization of new lignin streams derived from extractive-ammonia (EA) pretreatment?, Green Chemistry, vol. 18, no. 15, pp. 4205-4215, 2016.