Luciano JV, Barrada JR, Aguado J, Osma J, García-Campayo J. Bifactor analysis and construct validity of the HADS: a cross-sectional and longitudinal study in fibromyalgia patients. Psychological Assessment. 2014 Jun;26(2):395-406.
Richards EJ, Chao S, Vongs A, Yang J. Characterization of Arabidopsis thaliana telomeres isolated in yeast. Nucleic Acid Res. 1992 Aug 11;20(15):4039-46.