1. Funny and sad and friendly: a drama project in Scotland;Killick;J Dementia Care,2003
2. The LaughterBoss;Spitzer,2011
3. Spreading sunshine down memory lane: how clowns working in healthcare help promote recovery and rekindle memories;Warren,2009
4. Healing laughter: the role and benefits of clown-doctors working in hospitals and healthcare;Warren,2008