SCHWARTZ, John; HIDA, Hikari. Takuo Aoyagi, an Inventor of the Pulse Oximeter, Dies at 84. The New York Times (New York: The New York Times Company), 2020-05-01. Dostupné online [cit. 2024-03-05]. ISSN1553-8095. (po anglicky)
worldcat.org
SCHWARTZ, John; HIDA, Hikari. Takuo Aoyagi, an Inventor of the Pulse Oximeter, Dies at 84. The New York Times (New York: The New York Times Company), 2020-05-01. Dostupné online [cit. 2024-03-05]. ISSN1553-8095. (po anglicky)