Toneline, M. T., L. Papacidero, R. da S. Torres, S. F. Peron, and M. E. Kalil. “Recurrent Pleural Effusion As a Clinical Manifestation of Multiple Myeloma”. Revista Da Faculdade De Ciências Médicas De Sorocaba, vol. 15, no. 4, Dec. 2013, pp. 138-40, https://revistas-anterior.pucsp.br/index.php/RFCMS/article/view/15063.