How To Perform The Heimlich Maneuver When Someone Is Choking

https://www.hopkinsmedicine.org/health/wellness-and-prevention/choking-and-the-heimlich-maneuver

https://www.sciencedirect.com/topics/medicine-and-dentistry/heimlich-maneuver

https://www.novahealth.com/how-to-save-a-life-learn-how-to-administer-the-heimlich-maneuver/

https://www.emergencyphysicians.org/article/know-when-to-go/choking--heimlich-manuever

http://www.med.umich.edu/1libr/Neurology/ALS/HeimlichManeuver.pdf