Submitted on: 08 January 1999.
Revised on: 30 January 1999.
Accepted on: 26 February 1999.
Marketing and Management of Innovations
Submitted on: 12 June 2000.
Revised on: 21 July 2000.
Accepted on: 03 August 2000.
Marketing and Management of Innovations
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Submitted on: 07 June 2013.
Revised on: 03 July 2013.
Accepted on: 29 July 2013.
Marketing and Management of Innovations
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