References:

1. Lee, T.D., Surface Characterization by Heterogeneous Nucleation from the Vapor, in Applied    Physics, 1998, Harvard University: Cambridge, Massachusetts.
2. The colloidal Domain, D. Fennel Evans, Hakan Wennerstrom              
3. Advances in Physics, J. Feder, K. C. Russell, J. Lothe,G. M. Pound
4. Nucleation: Basic Theory with Applications, Dimo Kashchiev
5. http://en.wikipedia.org/wiki/Nucleation
6. http://www.engr.sjsu.edu/sgleixner/mate152/Lecture%20Notes/W11heteronucleation.pdf