1. Steinwandter H (1992) Fresenius J Anal Chem 343:604
2. Steinwandter H (1989) Umweltanalytik ? Nutzen oder Schaden. Lecture presented at the 101. VDLUFA-congress in Bayreuth, 21.09.1989
3. Steinwandter H (1990) VDLUFA-Schriftenr 30:543
4. Steinwandter H (1991) Development of micro extraction methods in residue analysis. In: Sherma J, Cairns T (eds) Analytical methods for pesticides and plant growth regulators, vol 1. CRC Press, Cleveland, Ohio (in press)
5. Watts RR, Storherr RW (1965) J Assoc Offic Anal Chem 48:1158