Non-hyperbolicity and invariant measures for unimodal maps
Annales de l'I.H.P. Physique théorique, Tome 53 (1990) no. 4, pp. 427-429. 
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     author = {Nowicki, Tomasz and Van Strien, Sebastian},
     title = {Non-hyperbolicity and invariant measures for unimodal maps},
     journal = {Annales de l'I.H.P. Physique th\'eorique},
     pages = {427--429},
     publisher = {Gauthier-Villars},
     volume = {53},
     number = {4},
     year = {1990},
     mrnumber = {1096101},
     zbl = {0717.58037},
     language = {en},
     url = {http://www.numdam.org/item/AIHPA_1990__53_4_427_0/}
}
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Nowicki, Tomasz; Van Strien, Sebastian. Non-hyperbolicity and invariant measures for unimodal maps. Annales de l'I.H.P. Physique théorique, Tome 53 (1990) no. 4, pp. 427-429. http://www.numdam.org/item/AIHPA_1990__53_4_427_0/

[B-Y] M. Benedicks and L.S. Young (to appear).

[BL] A.M. Blokh and M.Yu. Lyubich, Measurable Dynamics of S-Unimodal Maps of the Internal, Preprint, 1989.

[C-E] P. Collet and J.-P. Eckmann, Positive Liapounov Exponents and Absolute Continuity for Maps of the Interval, Erg. Th. Dynam. Syst., Vol. 3, (13-46), 1983. | MR | Zbl

[K] G. Keller, Exponents, Attractors, and Hopf Decompositions for Interval Maps, Preprint, 1988. | MR

[N-S] T. Nowicki and S.J. Van Strien, Absolutely Continuous Invariant Measures for C2 Maps Satisfying the Collet-Eckmann Conditions, Invent. Math., Vol. 93, 1988, pp. 619-635. | MR | Zbl