References to the use of Ulva clathrata as various foods, before 1997. Also referred to as Enteromorpha clathrata (currently regarded as a synonym of Ulva clathrata *) in the books:
•Madlener. J.C. The Seavegetables book. New york: Clarkson N. Potter, Inc 1977, p.77 and 166-167
•Arasaki, S. & Arasaki, T. Vegtables from the Sea, Toyko; Japan Publications, 1983, p. 31
•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=215