- http://doc.haohtml.com/
- http://web-algarve.com/books/
- https://help.sap.com/businessobject/product_guides/default.asp
- https://docs.oracle.com/cd/E19776-01/
- https://www.cspinet.org/new/pdf/
- https://glassfish.java.net/hol/
- http://venus.lafox.net/Books/
- https://cyyun.chekiang.info/zhangnq/PostgreSQL/