| | *"[http://www.telegraph.co.uk/news/obituaries/science-obituaries/8658435/Robert-Ettinger.html Robert Ettinger]". The Telegraph. July 24, 2011. Retrieved May 1, 2013. "Despite his Jewish roots, he grew up a determined atheist." | | *"[http://www.telegraph.co.uk/news/obituaries/science-obituaries/8658435/Robert-Ettinger.html Robert Ettinger]". The Telegraph. July 24, 2011. Retrieved May 1, 2013. "Despite his Jewish roots, he grew up a determined atheist." |
| | *Klein, Bruce (August 13, 2004). "[http://www.longecity.org/forum/topic/4112-the-father-of-cryonics-robert-c-w-ettinger/ The Father of Cryonics], Robert C. W. Ettinger, Interview with Bruce Klein". Immortality Institute. Retrieved May 24, 2009.</ref> According to The Cryonics Society, Asimov said of cryonics, "Though no one can quantify the probability of cryonics working, I estimate it is at least 90%..."<ref>[http://www.cryonicssociety.org/aboutcryonics_critics.html Cryonics and critics], The Cryonics Society</ref> | | *Klein, Bruce (August 13, 2004). "[http://www.longecity.org/forum/topic/4112-the-father-of-cryonics-robert-c-w-ettinger/ The Father of Cryonics], Robert C. W. Ettinger, Interview with Bruce Klein". Immortality Institute. Retrieved May 24, 2009.</ref> According to The Cryonics Society, Asimov said of cryonics, "Though no one can quantify the probability of cryonics working, I estimate it is at least 90%..."<ref>[http://www.cryonicssociety.org/aboutcryonics_critics.html Cryonics and critics], The Cryonics Society</ref> |