%0 Journal Article %T Regularization of Gamma_1-structures in dimension 3 %A Francois Laudenbach %A Ga£żl Meigniez %J Mathematics %D 2009 %I arXiv %X For $\Gamma_1$-structures on 3-manifolds, we give a very simple proof of Thurston's regularization theorem, first proved in \cite{thurston}, without using Mather's homology equivalence. Moreover, in the co-orientable case, the resulting foliation can be chosen of a precise kind, namely an "open book foliation modified by suspension." There is also a model in the non co-orientable case. %U http://arxiv.org/abs/0906.1748v3