1. Beyond objectivism and relativism;Bernstein,1983
2. Bickhard M.H. (in press). The nature of psychopathology. In L. Downing (Ed.), International psychotherapy: Theories, research, and cross-cultural implications. New York: Praeger.
3. Vestiges of logical positivism: Critiques of stage explanations;Bickhard;Human Development,1985
4. Knowing levels and developmental stages;Campbell,1986
5. A theory of personality change;Gendlin,1970