References to the use of Ascophyllum nodosum f. mackaii as food, before 1997. Also referred to as Ascophyllum mackaii (currently regarded as a synonym of Ascophyllum nodosum f. mackaii *) in the book:
• Madlener. J.C. The Seavegetables book. New york: Clarkson N. Potter, Inc 1977, p. 57
• Chapman, V.J. and Chapman, D.J. Seaweeds and Their Uses. London: Chapman and Hall, 1980, p. 64
* https://www.algaebase.org/search/species/detail/?species_id=12308