Allen, A. P., Smith, A. P.: A review of the evidence that chewing gum affects stress, alertness and cognition. In: Journal of behavioral and neuroscience research 9, 7 – 23, 2011

Allen, A. P., Smith, A. P.: Chewing Gum: Cognitive Performance, Mood, Well-Being and associated Physiology.In: BioMed Research International: Chewing, Stress-Related Diseases and Brain Function, 2015

Erbay, F. M. et al.: Chewing gum may be an effective complementary therapy in patients with mild to moderate depression.In: Appetite 65, 31 – 34, 2013

Hirano, Y., Onozuka, M.: Chewing and attention: A positive effect on sustained attention. In: BioMed Research International: Chewing, Stress-Related Diseases and Brain Function, 2015

Kubo, K. et al.: Chewing, Stress-Related Diseases and Brain Function.In: BioMed Research International: Chewing, Stress-Related Diseases and Brain Function, 2015

Kubo, K. et al.: Mastication as a stress coping behavior.In: BioMed Research International: Chewing, Stress-Related Diseases and Brain Function, 2015

Ono, Y. et al: Chewing prevents stress-induced hippocampal LTD formation and anxiety-related behaviors: A possible role of the dopaminergic system.In: BioMed Research International: Chewing, Stress-Related Diseases and Brain Function, 2015

Ono, Y. et al.: Occlusion and brain function: mastication as a prevention of cognitive disfunction.In: Journal of Oral Rehabilitation 37, 624 – 640, 2010

Ono, Y. et al.: Prefrontal Hemodynamic Changes associated with subjective sense of occlusal discomfort.In: BioMed Research International: Chewing, Stress-Related Diseases and Brain Function, 2015

Otsuka, T. et al.: Effects of mandibular retrusive deviation on prefrontal cortex activation.In: BioMed Research International: Chewing, Stress-Related Diseases and Brain Function, 2015

Onyper, S. V. et al.: Cognitive advantages of chewing gum. Now you see them, now you don´t.In: Appetite 57, 321 – 328, 2011

Scholey, A. et al.: Chewing gum alleviates negative mood and reduces cortisol during acute laboratoy psychological stress.In: Physiology and Behavior 97, 304 – 312, 2009

Scholey, A.: Chewing gum and cognitive performance: A case of a functional food with function but no food?In: Appetite 43, 215 – 216, 2004

Smith, A.: Effects of chewing gum on cognitive function, mood and physiology in stressed and non-stressed volunteers.In: Nutritional Neuroscience 13, No.1 , 7 – 16, 2010

Smith, A.: Effects of chewing gum on mood, learning, memory and performance of an intelligence test.In: Nutritional Neuroscience 12, No. 2, 81 – 88, 2009

Walker, J. et al: Chewing unflavored gum does not reduce cortisol levels during a cognitive task but increases the response of the sympathetic nervous system.In: Psysiology and Behavior 154, 8 – 14, 2016

Weijenberg, R., Lobbezoo, F.: Oral habits to cope with pain and stress and to stimulate cognition.In: BioMed Research International: Chewing, Stress-Related Diseases and Brain Function, 2015