Rocha, José Renato, AND 		Figueiró, Adriano.
" POLUIÇÃO DO AR NO BAIRRO CENTRO DE SANTA MARIA/RS: variáveis geourbanas e geoecológicas (air pollution for particulate matter in the centro district of Santa Maria/RS: an analysis from geourbans and geocological variables)" <em>Mercator</em> [Online], Volume 9 Number 18 (25 May 2010)