Kohar, I., Soediman, S., Mario, M., Vinolia, D., Puspaningsih, N. N. T. and Janssen, L. (2017) “Screening Variables in Reducing the Brown Color from the Filtrate of Heavy Metal’s Elimination”, MPI (Media Pharmaceutica Indonesiana), 1(2), pp. 68-76. doi: 10.24123/mpi.v1i2.188.