Brent Menninger, «Half-Smile and Serenity,» DBT Self Help, .
754
Niall M. Broomfield and Colin A. Espie, «Initial Insomnia and Paradoxical Intention: An Experimental Investigation of Putative Mechanisms Using Subjective and Actigraphic Measurement of Sleep,» Behavioural and Cognitive Psychotherapy 31 (2003): 313–24.