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Submitted on: 02 August 2002.
Revised on: 29 August 2002.
Accepted on: 16 September 2002.
___________________INORGANIC MATERIALS---MAIK NAUKA/INTERPERIODICA/SPRINGER
Submitted on: 14 December 1998.
Revised on: 21 February 1999.
Accepted on: 26 March 1999.
___________________INORGANIC MATERIALS---MAIK NAUKA/INTERPERIODICA/SPRINGER
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