TY - JOUR A1 - Cierpiszewski, Ryszard A1 - Rusinska-Roszak, D. A1 - Szymanowski, Jan A1 - Mickler, Wulfhard A1 - Uhlemann, Erhard T1 - Rate of coper extraction and structure of model ß-diketones and 4-acyl-5-pyrazolones Y1 - 1998 ER -