Question

I have been trying to read up a bit on internationalization (foreign market entry). However, by a simple spelling mistake I generated a lot of articles on "internalization" instead of "internationalization". So I have been reading a lot on internalization (Buckley and Casson, 1976). This has of course confused me a lot. And now I see my mistake. However internalization has in my oppinion a connection to International Business because internalization is often talked about in regard to Multinational Enterprises. So, right now, I wonder how internalization and internationalization are connected? What is the difference between internalization theory and internationalization? Is there anything in common between these two words/theories etc?