Fernandez-Ballesteros R, Frensch P A, Hofer S M, Park D C, Pinquart M, Silbereisen R K, Staudinger U M, Wahl H-W, Whitfield K E
Department of Biological Psychology and Health, School of Psychology, University of Madrid, Spain.
Z Gerontol Geriatr. 2009 Apr;42(2):163-4. doi: 10.1007/s00391-009-0033-9.