https://ru.wikipedia.org/wiki/%D0%AE%D1%80%D0%B8,_%D0%93%D0%B0%D1%80%D0%BE%D0%BB%D1%8C%D0%B4_%D0%9A%D0%BB%D0%B5%D0%B9%D1%82%D0%BE%D0%BD#cite_ref-Silverstein_Alvin_Harold_Urey_1970_1-0
https://ru.wikipedia.org/wiki/%D0%A2%D1%8F%D0%B6%D1%91%D0%BB%D0%B0%D1%8F_%D0%B2%D0%BE%D0%B4%D0%B0
