Islam, S., N. Jahan, N. Sultana, and R. Akter. “FVC, FEV<sub>1</sub> and FEV<sub>1</Sub>/FVC% in Patients With Depressive Illness and Their Relationships With the Level of Depression”. Journal of Bangladesh Society of Physiologist, vol. 5, no. 2, Jan. 2011, pp. 94-100, doi:10.3329/jbsp.v5i2.6784.