Low-temperature microwave emission from molecular clusters A. Hernández-Mínguez, M. Jordi, R. Amigó, A. García-Santiago, J. M. Hernandez and J. Tejada Europhys. Lett., 69 2 (2005) 270-276 Published online: 17 December 2004 DOI: 10.1209/epl/i2004-10337-8