1. Nonpharmacological interventions for insomnia: a meta-analysis of treatment efficacy;Morin;Am. J. Psych.,1994
2. The Relaxation Response;Benson,1975
3. Relaxation;Lichstein,2000
4. Progressive Relaxation Training;Bernstein,1973
5. Progressive Relaxation: A Physiological and Clinical Investigation of Muscular States and their Significance in Psychology and Medical Practice;Jacobson,1929