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Submitted on: 03 January 1999.
Revised on: 21 April 1999.
Accepted on: 19 May 1999.
___________________JOURNAL OF MICROENCAPSULATION---TAYLOR & FRANCIS LTD
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Submitted on: 22 November 2010.
Revised on: 14 January 2011.
Accepted on: 07 February 2011.
___________________JOURNAL OF MICROENCAPSULATION---TAYLOR & FRANCIS LTD