Prabawati, S. Y., J. Jumina, S. J. Santosa, and M. Mustofa. “The Utilization of Poly-37,40-Diallyl-38,39,41,42,-tetrahydroxycalix[6]arenes Compound As Adsorbent for Heavy Metal Cations Cd(II), Cr(III) and Cu(II)”. Jurnal Kimia Riset, vol. 5, no. 2, Dec. 2020, pp. 94-99, doi:10.20473/jkr.v5i2.22260.