Baillie K, Simpson A. "Altitude oxygen calculator". Apex (Altitude Physiology Expeditions). Archived from the original on 2017-06-11. Retrieved 2006-08-10. - Online interactive oxygen delivery calculator
Normal Reference Range Table from The University of Texas Southwestern Medical Center at Dallas. Used in Interactive Case Study Companion to Pathologic basis of disease.
Baillie K, Simpson A. "Altitude oxygen calculator". Apex (Altitude Physiology Expeditions). Archived from the original on 2017-06-11. Retrieved 2006-08-10. - Online interactive oxygen delivery calculator