AYATOLLAHI, S. M., F. KOBARFARD, H. KOMEYLIZADE, N. A. KASHANI, N. AFZA, and A. MALlK. “?The Chemical Constituents OfPotamogeton Pectinatus: ?Short Communication”. Biological Sciences - PJSIR, vol. 40, no. 5-12, Oct. 1997, pp. 1-1, https://v2.pjsir.org/index.php/biological-sciences/article/view/2344.