Can habitable planets form in clustered environments? M. de Juan Ovelar, J. M. D. Kruijssen, E. Bressert, L. Testi, N. Bastian and H. Cánovas A&A, 546 (2012) L1 Published online: 26 September 2012 DOI: 10.1051/0004-6361/201219627