1. American Association of Colleges of Nursing 2010 The research-focused doctoral program in nursing: Pathways to excellence http://www.aacn.nche.edu/education-resources/PhDPosition.pdf
2. American Association of Colleges of Nursing 2015 Nursing faculty shortage fact sheet http://www.aacn.nche.edu/media-relations/FacultyShortageFS.pdf
3. Canadian Association of Schools of Nursing 2011 Position statement: Doctoral education in nursing in Canada http://casn.ca/wp-content/uploads/2014/10/DoctoralEducation2011.pdf
4. Thoughts about multidisciplinary, interdisciplinary, and transdisciplinary research;Fawcett;Nursing Science Quarterly,2013