Ulumudin, M. M., and T. . Purnomo. “Analysis of the Heavy Metal Content of Lead (Pb) in Papyrus (Cyperus Papyrus L.) in Wangi River Pasuruan”. LenteraBio : Berkala Ilmiah Biologi, vol. 11, no. 2, Feb. 2022, pp. 273-8, doi:10.26740/lenterabio.v11n2.p273-283.