D.A. HERNANDEZ ROMERO, M. ALBIN, H. WELINDER, J.E. KARLSSON, U. STROMBERG, A. OUDIN, G. SEQUEIRA, M. JIMENEZ, R.L. BLANCO, F. SANCHEZ. (2006). EXPOSURE TO COMBUSTION PRODUCTS AND RESPIRATORY SYMPTOMS AMONG INFORMAL WORKING CHILDREN AT THE CITY DUMP “LA CHURECA” IN MANAGUA, NICARAGUA.