1. Fatal methaemoglobinaemia in a dental nurse. A case of sodium nitrite poisoning;J, Gowans W.;British Journal of General Practice,1990
2. Clinical Haematology;M., Wintrobe M.; R., Less G.; l. R, Boggs;et al,1974
3. Methemoglobinemia after ingestion of amyl nitrite;J., Forsyth R.; A, Moulden;Archives of Disease in Childhood,1991
4. Phillips D.M., Gradisek R. & Heiselman D.E.
5. Laaban J.R, Boopenen R & Rochemaure J. (1985)