Bergamasco, Ellen Cristina, and Diná de Almeida Lopes Monteiro da Cruz. “Sleep Disturbances: Frequent Diagnoses in Inpatients”. Revista Gaúcha De Enfermagem, vol. 27, no. 3, June 2008, p. 356, https://seer.ufrgs.br/index.php/rgenf/article/view/4624.