http://classes.yale.edu/Fractals/MultiFractals/welcome.html

http://www.amazon.com/exec/obidos/tg/detail/-/0387985395/002-8379713-7872046?v=glance

http://www.amazon.com/exec/obidos/tg/detail/-/1584881542/002-8379713-7872046?v=glance

http://mathworld.wolfram.com/Multifractal.html