http://www.researchgate.net/profile/Natalie_Parletta/publication/5335527_Cognitive_effects_of_polyunsaturated_fatty_acids_in_children_with_attention_deficit_hyperactivity_disorder_symptoms_a_randomised_controlled_trial/links/00b7d5166427b625c0000000.pdf
http://web.uvic.ca/~lccl/sites/default/files/2014_UmemotoEtAl.pdf