Catholic References On Molinism And Thomism

[TheUbiquitous]

Looking to write a 20-page essay for entry into grad school. Not having a theology degree, this essay is going to be an important factor. I've narrowed down the topic to Molinism vs. Thomism. I'd like to narrow the scope to some aspect regarding counterfactuals. 

 

For broad background, I already have the canons of the Second Council of Orange, the decree On Justification from the Council of Trent, and Predestination by Fr. Garrigou-Lagrange. Are there other major sources I should use? 

 

(Molina's work, probably, and Aquinas --- I'm having trouble Googling references, however.)