Scheibe, Susanne Center for Lifespan Psychology, Max Planck Institute for Human Development, Max Planck Society;
https://refubium.fu-berlin.de/handle/fub188/12017 (Any fulltext)
Scheibe, S. (2005). Longing ("Sehnsucht") as a new lifespan concept: A developmental conceptualization and its measurement in adulthood. PhD Thesis, Freie Universität Berlin.