1. [4] A. Bahri and P. H. Rabinowitz, Periodic solutions of Hamiltonian systems of $3$-body type, Ann. Inst. H. Poincaré Anal. Non Linéaire 8 (1991), no. 6, 561–649.
2. [1] A. Bahri, The scalar-curvature problem on spheres of dimension $n\geqslant7$, preprint.
3. [2] A. Bahri, Letter to various mathematicians pointing out a gap in [1].
4. [3] A. Bahri, Critical points at infinity in some variational problems, Pitman Research Notes in Mathematics Series, vol. 182, Longman Scientific & Technical, Harlow, 1989.
5. [5] J. Milnor, Lectures on the $h$-cobordism theorem, Notes by L. Siebenmann and J. Sondow, Princeton University Press, Princeton, N.J., 1965.