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- Sven Hroar Klempe, Two sources for a meta-theoretical framework in psychology
- Lewis Kirshner, Comments on "Compartmentalization and unity of professional psychology. A road map for the future of the discipline", by Salvatore and colleagues
- Gordon Sammut, Outline of a grand theory of psychological activity
- Jose’ Saporta, On unifying psychology: A view from the trenches; and what’s wrong with pluralism anyway?
- Tania Zittoun, Martina Cabra, Dynamics of defragmentation