@article{article4a211e07,
title   = {Investigation of factors associated with difficult-to-control asthma},
author = {Araujo, Ana Carla Sousa de and Ferraz, Érica and Borges, Marcos de Carvalho and Terra Filho, João and Vianna, Elcio Oliveira},
year = {2007},
journal   = {Jornal Brasileiro de Pneumologia}
}