I have the same question for OP as well. It seems most of the cited sources in post #1 are not "scholarly" enough for any dissertation in a reputable university.

I bet if OP had used scholar.google.com, you would at least come up with more references in regards to the topics you are conducting your research. For instance, OP's question #3 (What do you forsee for the (European) “FFP-market” for the future? What about the trends, some news, innovations?), shouldn't it be the part to use your analytic ability to figure that out?

Nevertheless, MileBuzz! is not the forum for collecting data for dissertation, IMHO.

Edited to add (after realizing OP's work is not a dissertation by U.S. standard):

Judging from your other post, you are an undergraduate student in Budapest. I am not familiar with the education systems in Europe. Here in the U.S., "dissertation" is the degree requirement for Ph.D., while "thesis" for master's degree. There's no standardized writing requirement for undergraduate degrees. Your use of "dissertation" in your post certainly raise questions and confusion to the American audience. My advice, use a better term that suit your writing requirement.

BTW, if your deadline to complete the work is mid May, 2008, well, you've already missed it.