@article{Martín–Fernández2003,
author = {Martín–Fernández, J.A. and Barceló–Vidal, C. and Pawlowsky–Glahn, V.},
title= {Dealing With Zeros and Missing Values in Compositional Data Sets Using Nonparametric Imputation},
year = {2003},
volume = {35},
number = {3},
pages = {253--78},
}