"Arteriovenous oxygen difference". Sports Medicine, Sports Science and Kinesiology. Net Industries and its Licensors. 2011. Arkiveret fra originalen 12. juni 2011. Hentet 30. april 2011.
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"Arteriovenous oxygen difference". Sports Medicine, Sports Science and Kinesiology. Net Industries and its Licensors. 2011. Arkiveret fra originalen 12. juni 2011. Hentet 30. april 2011.