S. Khemthong, T. Chentanez, B. Withayachumnarnkul, Y. Sanvarida, and C. Jitpraphai, “The Relationship between a High Level of Physical Fitness and Working Memory in Blind, Deaf, and Non-disabled Adolescents”, Siriraj Med J, vol. 54, no. 4, pp. 224–230, Apr. 2002.