CTDI

http://www.ctug.org.uk/meet06-11-16/dose_measurement_cone_beam_ct_how_appropriate_is_10_cm_pencil_chamber.pdfhttp://www.ctug.org.uk/meet06-11-16/dose_measurement_cone_beam_ct_how_appropriate_is_10_cm_pencil_chamber.pdf

Behavior and motivational model

http://www.behaviormodel.org/index.html

Running and the heart

http://indorgs.virginia.edu/MuscleClub/OKeefe_JH_article1%2B2.pdfhttp://indorgs.virginia.edu/MuscleClub/OKeefe_JH_article1%2B2.pdf