1. Distributed generation: definition, benefits and issues
2. International Energy Agency (IEA) ‘Distributed generation in liberalised electricity markets’, Paris, France, 2002
3. Willis, H.L.: ‘Power distribution planning book’, (Marcel Dekker, Inc., New York 1997)
4. IEEE Power Engineering Society: ‘Tutorial on modern heuristic optimization techniques with applications to power systems’, http://labs.ee.psu.edu/labs/powerlab/ieee_tutorial.htm