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Lindenberger U, Baltes PB.Lindenberger U, et al.Psychol Aging. 1997 Sep;12(3):410-32. doi: 10.1037//0882-7974.12.3.410.Psychol Aging. 1997.PMID: 9308090
Lindenberger U, Marsiske M, Baltes PB.Lindenberger U, et al.Psychol Aging. 2000 Sep;15(3):417-36. doi: 10.1037//0882-7974.15.3.417.Psychol Aging. 2000.PMID: 11014706