Reference for Turan Density

I am working a 3-graph problem. I convert it to calculate Turan density, that is $lim_{n\to \infty}\frac{ex_3(n,F)}{\binom{n}{3}}$, where F is a3-graph. I'd like to know are there some methods and classic papers in this area?

• This is a rather broad question. We are very bad at calculating Turán densities, with exact answers known for very few $F$. It might help to know a little bit about the $F$ you are interested in. – Ben Barber May 7 '16 at 11:00
• @BenBarber I'm interested in tight cycles, expansion of stars and the 3-graphs viewing triangles of wheels as edges. – Connor May 7 '16 at 20:05