Sources
1. Boice, R. (1997).  Which is more productive, writing in binge patterns of creative illness or in moderation?  Written Communication, 14, 435-459.

2. Boice, R. (1983). Contingency management in writing and the appearance of creative ideas: Implications for the treatment of writing blocks.  Behaviour Research and Therapy, 21, 537-543.

3. Silvia, P. J. (2007).  How to write a lot: A practical guide to productive academic writing. Washington, DC: American Psychological Association.