First time I've finished the LET paper! (Wednesday)

JM Smith. 1966. Sympatric Speciation. Am. Nat. 100(916): 637-650.

Easy to follow math! Also: (The section about Pleiotropism in its entirety.)

"The gene pair A, a adapting individuals to different niches may themselves cause assortative mating: i.e., A- mating with A- and aa with aa. This seems very unlikely."

Pretty cool that you can just name your paper 'Sympatric Speciation'.