==External links==* X Toolkit Intrinsics - C Language Interface, X.Org Foundation* The place of Intrinsics in X11, Professor David Marshall, Cardiff School of Computer Science, Cardiff University* TestXt2, Example C program that creates a Menu Bar using just Xt/Xaw* http://portal.acm.org/citation.cfm?id=62402.62407
* X Window System* Xlib* Xaw* X Toolkit Intrinsics — C Language Interface, X.Org Foundation* The place of Intrinsics in X11, Professor David Marshall, Cardiff School of Computer Science, Cardiff University* TestXt2, пример программы на C, создающей строку меню, используя Xt/Xaw* http://portal.acm.org/citation.cfm?id=62402.62407