Нерешённые проблемы репродуктивной медицины XXI века
Послесловие засл. деятеля науки РФ, член-корра РАН, проф. Радзинского Виктора Евсеевича, «Сочинские контраверсиии — 23»
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![Самая простая нерешённая задача — гипотеза Коллатца [Veritasium]](https://sun9-43.userapi.com/AooFjOGl1-XEHhwZNu0iF17j1HTqNDOZpymaHw/6bULQyx9Chs.jpg)
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