HISTORY OF THE VACUUM FLASK*
BY SIR WILLIAM BRAGG, O.M, K.B.E., PRES. R.S
NATURE MARCH 16, 1940, VoL. 145
https://www.nature.com/articles/145408a0.pdf

https://www.worldofchemicals.com/494/chemistry-articles/james-dewar-inventor-of-dewar-flask.html

https://thermos.com/pages/history#:~:text=In%201892%2C%20Scottish%20scientist%20Sir,flask%20at%20a%20stable%20temperature.

https://www.britannica.com/technology/vacuum-flask

https://www.rigb.org/explore-science/explore/collection/james-dewars-vacuum-flask