^Martone, Pt; Estevez, Jm; Lu, F; Ruel, K; Denny, Mw; Somerville, C; Ralph, J. Discovery of Lignin in Seaweed Reveals Convergent Evolution of Cell-Wall Architecture.. Current Biology. Jan 2009, 19 (2): 169–75. ISSN 0960-9822. PMID 19167225. doi:10.1016/j.cub.2008.12.031.
^Lebo, Stuart E. Jr.; Gargulak, Jerry D.; McNally, Timothy J. Lignin. Kirk‑Othmer Encyclopedia of Chemical Technology. John Wiley & Sons, Inc. 2001 [2007-10-14]. doi:10.1002/0471238961.12090714120914.a01.pub2. (原始内容存档于2020-04-10).