Adaptive mental mechanisms: Their role in a positive psychology
American Psychologist (2000) - Comment
doi: 10.1037/0003-066x.55.1.89  issn: 1935-990x  issn: 0003-066x  pubmed: 11392869  doi: 10.1037//0003-066x.55.1.89 

George E. Vaillant