R. . BEN SAID, H. AOUINI, and F. AKROUT, “Gracilaria bursa-pastoris of Bizerte lagoon (North of Tunisia): a spatio –temporal study of some hydro biological parameters, agar yield and quality”, Bull. Inst. Natl. Sci. Technol. Mer, vol. 44, pp. 165–174, Nov. 2017.