1. De Grout R. (1979) “A method for rapid semi-quantitative determination of gas chromatographiable organic matter in surface water. ” H20, 12, 333.
2. Errede L., Hoyt J.M. (1960) J. Am. Chem. Soc., 82, 436
3. IARC (1980) Scientific Publication n° 31 “N-nitrosocompounds: analysis, formation and occurence. ” Edited by E.A. Walker, M. Castegnaro, L. Griciute, M. Börzsönyi - Lyon-France.
4. IARC (1984) Scientific publication n° 57.
5. Acs Symposium serie;LK Keefer,1981