Schmitt, J. H. M. M; Fleming, T. A; Giampapa, M. S. (1995). „The X-Ray View of the Low-Mass Stars in the Solar Neighborhood“. Astrophysical Journal. 450 (9): 392–400. Bibcode:1995ApJ...450..392S. doi:10.1086/176149.
Schmitt, J. H. M. M; Fleming, T. A; Giampapa, M. S. (1995). „The X-Ray View of the Low-Mass Stars in the Solar Neighborhood“. Astrophysical Journal. 450 (9): 392–400. Bibcode:1995ApJ...450..392S. doi:10.1086/176149.