Debats, Dominique Louis Henri Maria (1996), Meaning in life : psychometric, clinical and phenomenological aspects, dissertatie RUG) (http://irs.ub.rug.nl/ppn/152282297)

De Lange, Frits. (2007). De mythe van het voltooide leven. Over de oude dag van morgen. Zoetermeer, Meinema.

Reker, Gary T., Chamberlain, Kerry (eds.) (2000), Exploring Existential Meaning: Optimizing

Human Development Across the Life Span, Thousand Oaks , London, New Dehli: Sage Publications Inc.