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1de réir Plattner, HassoAvailable for University of the Philippines Diliman via SpringerLink. Click here to access
Foilsithe / Cruthaithe 2011
Electronic Resource -
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3de réir Yang, ZihengAvailable for University of the Philippines Diliman via Oxford Scholarship Online. Click her to access
Foilsithe / Cruthaithe 2006
Electronic Resource -
4Foilsithe / Cruthaithe 2000Also available remotely for University of the Philippines System via Science Direct through. Click here to access thru Open Athens
Electronic Resource