1. Organic Reagents for Metals;Welcher,1979
2. Photometric and Fluorometric Methods of Analysis Metals;Snell,1978
3. Separation and Spectrophotometric Determination of Elements;Marczenko,1986
4. Photometric Determination of Traces of Metals;Onishi,1986
5. Organic Analytical Reagents for the Determination of Inorganic Substances;Ackermann,1992