@article{articleee54bc2d,
title   = {Automatic spectrophotometric determination of copper in plant material, soil, and fertilizer mixtures bya kinetic method},
author = {Rodella, Arnaldo Antonio and Baccan, Nivaldo},
year = {1999},
doi = {10.1080/00103629909370316},
journal   = {Communications in Soil Science and Plant Analysis}
}