@article{article9925f6cc,
title   = {Sample size for estimating the mean concentration of organisms in ballast water},
author = {Costa, Eliardo Guimarães da and Lopes, Rubens Mendes and Singer, Júlio da Motta},
year = {2016},
doi = {10.1016/j.jenvman.2016.05.043},
journal   = {Journal of Environmental Management}
}