WASET
    I. F. Fiţigău and  F. Peter and  C. G. Boeriu,  Structural Analysis of Lignins from Different Sources.   journal   = {International Journal of Materials and Metallurgical Engineering}, [online]. World Academy of Science, Engineering and Technology.
    April 2013, vol. 76(4). 167 - 172
    [viewed 24 April 2024]. Available from: https://publications.waset.org/pdf/4184.