Mahltig, Boris. “Overview on Natural Dyes and Their IR-Spectra - Part VI: Algae Based Pigments ”. Communications in Development and Assembling of Textile Products 6, no. 1 (October 4, 2025): 123–137. Accessed October 7, 2025. https://cdatp.journals.qucosa.de/cdatp/article/view/206.