References to the use of Scytosiphon lomentaria as food, namely soups before 1997. In the books:
•Madlener. J.C. The Seavegetables book. New york: Clarkson N. Potter, Inc 1977, p. 149
•Arasaki, S. & Arasaki, T. Vegtables from the Sea, Toyko; Japan Publications, 1983, p. 31 and 100
•Chapman, V.J. and Chapman, D.J. Seaweeds and Their Uses. London: Chapman and Hall, 1980, p. 66