Protostellar clusters in intermediate mass (IM) star forming regionsA. Fuente, C. Ceccarelli, R. Neri, T. Alonso-Albi, P. Caselli, D. Johnstone, E. F. van Dishoeck and F. WyrowskiA&A, 468 3 (2007) L37-L40DOI: https://doi.org/10.1051/0004-6361:20077297