References
- Milner , B. A. and Whiteside , P. J. 1981 . Introduction to Atomic Absorption Spectrophotometry, , 2-nd. ed. Cambridge : Pye Unicam Publ. .
- Price , J. W. 1979 . Spectrochemical Analysis by Atomic Absorption Heyden & Son Ltd. .
- Baiulescu , G. E. and Năşcuţiu , T. 1974 . “ Methods for trace analysis ” . In Romanian Edited by: Bucureşti , Th. (in), Ed. ∗ ∗ ∗ “Physical analysis methods in analytical chemistry” (in Romanian) Centrul de Documentare al Ind. Ch. şl Petroch., Bucureşti, l-st vol. 1970
- Sváb , J. 1973 . Biometrical Methods in the Research Budapest : Mezógazd. Kiadó . (in Hungarian)