@article{article07c61748,
title   = {Quantifying mean grades and uncertainties from the ratio of service variables: accumulation to thickness. Applied to a phosphate deposit in Southern Mato Grosso, Brazil},
author = {Rampazzo, Guilherme and Yamamoto, Jorge Kazuo and Kikuda, Antonio Tadashi},
year = {2019},
doi = {10.1590/0370-44672017720154},
publisher = {FapUNIFESP (SciELO)},
journal   = {REM - International Engineering Journal}
}