Baltes, Paul B. Center for Lifespan Psychology, Max Planck Institute for Human Development, Max Planck Society;
Dittmann-Kohli, F., Lachman, M. E., Kliegl, R., & Baltes, P. B. (1991). Effects of cognitive training and testing on intellectual efficacy beliefs in elderly adults. The Journals of Gerontology: B, Psychological Sciences and Social Sciences, 46(4), P162-P164.