preprint-author: 
M. Martens and T. Nowicki
preprint-title: 
Invariant Measures for Typical Quadratic Maps
preprint-abstract: 

A sufficient geometrical condition for the existence of absolutely continuous invariant probability measures for S-unimodal maps will be discussed. The Lebesgue typical existence of such measures in the quadratic family will be a consequence.

preprint-year: 
1996