1. Meigs, J.F.: A Practical Treatise on the Disease of Children. Philadelphia , Blakiston, 1848, p. 451.
2. Breath-holding spells
3. Kanner, L.: Child Psychiatry, 3rd Ed. Springfield , Charles C Thomas, 1957, p. 393.
4. Bakwin, H. and Bakwin, R.M.: Clinical Management of Behavior Disorders in Children. Philadelphia, W. B. Saunders, 1960 , p. 389.