1. Shri R: Anxiety: causes and management. J Behav Sci. 2010, 5: 100-118.
2. Kessler RC, Greenberg PE:The economic burden of anxiety and stress disorders. Neuropsychopharmacology: the fifth generation of progress: American College of Neuropsychopharmacology. Edited by: Kenneth LD, Dennis C, Joseph TC, Charles N. 2002, Philadelphia, Lippincott: Williams & Wilkins,
3. Hoffman DL, Dukes EM, Wittchen HU: Human and economic burden of generalized anxiety disorder. Depress Anxiety. 2008, 25 (1): 72-90. 10.1002/da.20257.
4. Eysenck MW, Derakshan N: New perspectives in attentional control theory. Personal Individ Differ. 2011, 509: 55-960.
5. Durant C, Christmas D, Nutt D: The pharmacology of anxiety. Curr Top Behav Neurosci. 2010, 2: 303-330.