Submitted on: 06 September 2000.
Revised on: 14 October 2000.
Accepted on: 30 October 2000.
MICROCHIMICA ACTA---SPRINGER WIEN
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Submitted on: 16 September 2002.
Revised on: 20 October 2002.
Accepted on: 31 October 2002.
MICROCHIMICA ACTA
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Submitted on: 25 July 2001.
Revised on: 06 September 2001.
Accepted on: 20 September 2001.
MICROCHIMICA ACTA---SPRINGER WIEN
Submitted on: 08 February 2001.
Revised on: 23 February 2001.
Accepted on: 05 March 2001.
MICROCHIMICA ACTA