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Rav Shlomo Zalman Auerbach on Time of Death, Transplants, and Brain Death (4 Cheshvan)
שו"ת מנחת שלמה תנינא פו 4 Cheshvan 5728 (1967) 4 Cheshvan 5753 (1992)
Transplantation depends on defining the time of death. First in 1968 and then again in 1992, Rav Shlomo Zalman Auerbach took up the questions of figuring out the difference between dying and deceased.
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