Skrapec, C. and Ryan, K. , 2010-11-16 "The Macdonald Triad: Persistence of an Urban Legend" Paper presented at the annual meeting of the ASC Annual Meeting, San Francisco Marriott, San Francisco, California
Singer, Stephen D.; Hensley, Christopher (2004). „Learning theory to childhood and adolescent firesetting: Can it lead to serial murder?”. International Journal of Offender Therapy and Comparative Criminology48 (4): 461–476. DOI:10.1177/0306624X04265087. PMID15245657.
Wright, J.; Hensley, C. (2003). „From animal cruelty to serial murder: Applying the graduation hypothesis”. International Journal of Offender Therapy and Comparative Criminology47 (1): 71–88. DOI:10.1177/0306624X02239276. PMID12613433.
Wright, Jeremy; Hensley, Christopher (1 February 2003). „From Animal Cruelty to Serial Murder: Applying the Graduation Hypothesis”. International Journal of Offender Therapy and Comparative Criminology47 (1): 71–88. DOI:10.1177/0306624X02239276. PMID12613433.
Tallichet, S. E.; Hensley, C. (1 September 2004). „Exploring the Link between Recurrent Acts of Childhood and Adolescent Animal Cruelty and Subsequent Violent Crime”. Criminal Justice Review29 (2): 304–316. DOI:10.1177/073401680402900203.
Singer, Stephen D.; Hensley, Christopher (2004). „Learning theory to childhood and adolescent firesetting: Can it lead to serial murder?”. International Journal of Offender Therapy and Comparative Criminology48 (4): 461–476. DOI:10.1177/0306624X04265087. PMID15245657.
Wright, J.; Hensley, C. (2003). „From animal cruelty to serial murder: Applying the graduation hypothesis”. International Journal of Offender Therapy and Comparative Criminology47 (1): 71–88. DOI:10.1177/0306624X02239276. PMID12613433.
Wright, Jeremy; Hensley, Christopher (1 February 2003). „From Animal Cruelty to Serial Murder: Applying the Graduation Hypothesis”. International Journal of Offender Therapy and Comparative Criminology47 (1): 71–88. DOI:10.1177/0306624X02239276. PMID12613433.