On the invariant subspace problem in Banach spaces
Séminaire d'Analyse fonctionnelle (dit "Maurey-Schwartz") (1975-1976), Exposé no. 14 et 15, 6 p. 
@article{SAF_1975-1976____A11_0,
     author = {Enflo, P.},
     title = {On the invariant subspace problem in Banach spaces},
     journal = {S\'eminaire d'Analyse fonctionnelle (dit "Maurey-Schwartz")},
     note = {talk:14 et 15},
     publisher = {Ecole Polytechnique, Centre de Math\'ematiques},
     year = {1975-1976},
     zbl = {0341.46016},
     mrnumber = {473871},
     language = {en},
     url = {www.numdam.org/item/SAF_1975-1976____A11_0/}
}
Enflo, P. On the invariant subspace problem in Banach spaces. Séminaire d'Analyse fonctionnelle (dit "Maurey-Schwartz") (1975-1976), Exposé no. 14 et 15, 6 p. http://www.numdam.org/item/SAF_1975-1976____A11_0/

[1] P. Enflo, On the invariant subspace problem in Banach spaces, to appear. | Zbl 0663.47003

[2] P. Enflo and H. Montgomery, Norms and products of polynomials, to appear.