Rotationally-supported disks around Class I sources in Taurus: disk formation constraints D. Harsono, J. K. Jørgensen, E. F. van Dishoeck, M. R. Hogerheijde, S. Bruderer, M. V. Persson and J. C. Mottram A&A, 562 (2014) A77 Published online: 07 February 2014 DOI: 10.1051/0004-6361/201322646