LogiQL a query language for smart databases od Halpin, T. A., Rugaber, Spencer

Available for University of the Philippines Diliman College of Engineering via CRCnetBASE. Click here to access
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Information modeling and relational databases od Halpin, T. A.

Available for University of the Philippines System via ScienceDirect. Click here to access
Also available remotely for University of the Philippines System via ScienceDirect. Click here to access thru EZproxy