Campione, Mary; Walrath, Kathy; Huml, Alison. Object-Oriented Programming Concepts. [Online]. Sun Microsystems, Inc. Available: http://java.sun.com/docs/books/tutorial/java/concepts/index.html [2000, Dec. 23].
Kirkland, Bob. MaxeWorks [Online]. Available: http://www.mazeworks.com/ [2000, Aug 15].
Niemeyer, Patrick; Peck, Joshua. (1996, May). Exploring Java. O'Reilly.
Pullen, Walter D. Think Labyrinth, Maze Algorithms. [Online]. Available: http://www.astrolog.org/labyrnth/algrithm.htm [1999, May 28].
Taylor, David A., Ph.D. (1993, June). Object-Oriented Technology: A Manager's Guide. Addison-Wesley.