The ultracool dwarf DENIS-P J104814.7-395606 - Chromospheres and coronae at the low-mass end of the main-sequence
B. Stelzer, J. Alcalá, K. Biazzo, B. Ercolano, I. Crespo-Chacón, J. López-Santiago, R. Martínez-Arnáiz, J. H. M. M. Schmitt, E. Rigliaco, F. Leone and G. Cupani
