(原始内容存档于2024-07-26) (荷兰语). David Barboza. Chen Yifei, 59, Painter and Entrepreneur, Dies. The New York Times. 14 April 2005: A 25 [16 February 2021]. (原始内容存档于2024-08-05)
(原始内容存档于2008-01-30). James LeVoy Sorenson, World-Renowned Medical Device Inventor, Entrepreneur and Philanthropist, Dies at 86. PR Inside. 20 January 2008 [1 February