private String aboutText() {
        return 
        
        "Small World Agents [1.0] has been produced by the\nMulti Agents " + 
        "Systems and Simulation (MASS) Group at the University of Leeds, UK. \n\n" + 
        
        "It is a working framework for Agent based systems " + 
        "in which Agents can have a geographical location, and a location on a graph of " + 
        "connections between themselves and other Agents.\n\n" + 
        
        "The graphs can be developed into " + 
        "Small World Networks, using the algorithms published in Duncan J. Watt's 1999 paper " +
	"'Networks, Dynamics, and Small World Phenomenon', AJS, 105(2), 493-527. " + 
	"Similar algorithms can be found in his book 'Small Worlds'.\n\n" + 
        
        "The application should not be used for commercial or military purposes. For details " +
        "of the licensing of the source code, please contact the MASS group.\n\n" + 
        
        "http://www.geog.leeds.ac.uk/groups/mass/";
    }