Ntry barriers of Underground construction industry in Russia

This paper will be a part of my dissertation proposal. You will write half of my literature review. In the beginning you need to explain in theory what barriers to entry are (also include porter 5 forces), then barriers to entry for b2b industries, then barriers to entry for tunneling industry, especially for the russian industry. And lastly identify key factors and issues for existing and new investors. It is important to divide your paper in sub-headings, for example: Barriers to entry theoretical background, barriers to entry for b2b industries, barriers to entry for tunneling industry, especially Russian one.

Referencing Requirements:
only academic references as much as needed