Preston CC, Oberlin AS, Holmuhamedov EL, Gupta A, Sagar S, Syed RHK, Siddiqui SA, Raghavakaimal S, Terzic A, Jahangir A. Aging-induced alterations in gene transcripts and functional activity of mitochondrial oxidative phosphorylation complexes in the heart. Mechanisms of Ageing and Development. 2008 Jun;129(6):304–12. doi: 10.1016/j.mad.2008.02.010.