@article{DMPS_2009_29_2_a4,
     author = {Nat\'ario, Isabel and Luc{\'\i}lia Carvalho, M.},
     title = {Addressing the problem of lack of representativeness on syndromic surveillance schemes},
     journal = {Discussiones Mathematicae. Probability and Statistics},
     pages = {169--183},
     publisher = {mathdoc},
     volume = {29},
     number = {2},
     year = {2009},
     zbl = {1208.62174},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DMPS_2009_29_2_a4/}
}