G. Leoni, A First Course in Sobolev Spaces, Graduate Studies in Mathematics. 105. Providence, RI: American Mathematical Society (AMS), 2009.

G. Leoni, A First Course in Sobolev Spaces, Second Edition, Graduate Studies in Mathematics. 181. Providence, RI: American Mathematical Society (AMS), 2017.

I. Fonseca and G. Leoni, Modern Methods in the Calculus of Variations: Sobolev Spaces, in preparation, accepted for publication by Springer.