Spatially extended polycyclic aromatic hydrocarbons in circumstellar disks around T Tauri and Herbig Ae starsV. C. Geers, E. F. van Dishoeck, R. Visser, K. M. Pontoppidan, J.-C. Augereau, E. Habart and A. M. LagrangeA&A, 476 1 (2007) 279-289DOI: https://doi.org/10.1051/0004-6361:20078466
