Dixon-Coles, Ntzoufras, McHale, there are a few papers on Bivariate models from German authors (Groll...so google "Groll bivaraite Poisson"). I would also understand ranking algorithms (there is a book called Who's #1?). Bear in mind though, most papers are fictional/p-hacked/just bad.

I would also think carefully about what you are doing and why. Most people fail because they try to bet on markets that are, for them, unbeatable (for example, football data is expensive). It is far easier to pick off obscure markets (I did not do this because I had a junior high school maths education and needed some guidance).