Bourne JE, Sauchelli S, Perry R, Page A, Leary S, England C, Cooper AR. Health benefits of electrically-assisted cycling: a systematic review. Int J Behav Nutr Phy. 2018 Nov 21;15(1):116. doi: 10.1186/s12966-018-0751-8
Rodrigo-Claverol M, Malla-Clua B, Rodrigo-Claverol E, Jove-Naval J, Bergada-Bell-Iloc J, Marsal-Mora JR. Animal-assisted therapy for the emotional well-being of children with intellectual disabilities and behavioral disorders. Sociology and Anthropology. 2018 Jan;6(1):94-106. doi: 10.13189/sa.2018.060109
Fleming A, Goatman KA, Sharp PF, Styles CJ, Wikes WN, Olson JA. A large scale validation of automated grading. Eur J Ophthalmol. 2009 May 1;19(3):504.