Van Dishoeck, E. F. Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;
Visser, R., Doty, S. D., & Van Dishoeck, E. F. (2011). The chemical history of molecules in circumstellar disks - II. Gas-phase species. Astronomy & Astrophysics, 534: A132, pp. 1-18. doi:10.1051/0004-6361/201117249.