1. Baernstein, A. II: A unified approach to symmetrization. In: Alvino, A., et al. (eds.) Partial differential equations of elliptic type. In: Proceedings of the Conference held October 12–16, 1992 in Cortona, Italy. Symp. Math., vol. 35, pp. 47–91. University Press, Cambridge (1994)
2. Bandle C. (1980). Isoperimetric Inequalities and Applications. Monographs and Studies in Mathematics, vol. 7. Pitman Advanced Publishing Program, Boston
3. Brock F. (2004). Positivity and radial symmetry of solutions to some variational problems in $${\mathbb{R}}^N$$ . J. Math. Anal. Appl. 296(1): 226–243
4. Brothers J., Ziemer W. (1988). Minimal rearrangements of Sobolev functions. J. Reine Angew. Math. 384: 153–179
5. Cardaliaguet P., Tahraoui R. (1999). Inégalité de Hardy–Littlewood généralisée et applications au calcul des variations. C. R. Acad. Sci. Paris Sér. I Math. 329(6): 479–484