1Bader, P.. Variational method for the Hartree equation of the helium atom. Proc. Roy. Soc. Edinburgh Sect. A 82 (1978), 27–39.
2Brezis, H.. Nonlinear problems related to the Thomas-Fermi equation. North-Holland Math. Studies 30 (ed. de la Penha, G. and Medeiros, L. A.) (Amsterdam: North-Holland, 1977).
3Friedrichs, K.. Differentiability of solutions of elliptic partial differential equations. Comm. Pure Appl. Math. 5 (1953), 299–326.
4Gustafson, K. and Sather, D.. A branching analysis of the Hartree equation. Rend. Mat. 4 (1971), 723–734.
5Hardy, G. H., Littlewood, J. and Polya, G.. Inequalities (Cambridge Univ. Press, 1952).
6Hartree, D. R.. The calculations of atomic structures (New York: Wiley, 1957).
7Kato, T.. Perturbation theory for linear operators (New York: Springer-Verlag, 1966).
8Lieb, E. and Simon, B.. The Hartree-Fock theory for Coulomb systems. Comm. Math. Phys. 53 (1977), 185–194.
9Lieb, E.. Existence and uniqueness of the minimizing solution of Choquard's nonlinear equation. Studies in Appi Math. 57 (1977), 93–195.
10Reeken, M.. General theorem on bifurcation and its application to the Hartree equation of the Helium atom. J. Mathematical Phys. 11 (1970), 2505–2512.
11Strauss, W.. Existence of solitary waves in higher dimensions. Comm. Math. Phys. 55 (1977), 149–162.
12Stuart, C. A.. Existence theory for the Hartree equation. Arch. Rational Mech. Anal. 51 (1973) 60–69.