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4Published 2013Available for University of the Philippines Baguio. Click here to access
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5Published 2011Available for University of the Philippines System via SpringerLink. Click here to access
Electronic Resource -
6Published 2011Available for University of the Philippines Diliman via SpringerLink. Click here to access
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8Published 2011Available for University of the Philippines Diliman via SpringerLink. Click here to access
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9Published 2007Available for University of the Philippines System via Science Direct. Also available remotely thru Open Athens:
Electronic Resource