Evidence for shared genetic risk between ADHD symptoms and reduced mathematics ability: A twin study / C. U. Greven, Y. Kovas, E. G. Willcutt [et.al.] // Journal of child psychology and psychiatry. 2014. Vol. 55, № 1. P. 39-48. URL: http://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000469931