PACS:01.60.+q DOI:10.3367/UFNe.0182.201206i.0677 URL: https://ufn.ru/en/articles/2012/6/i/ 000308868100008 2012PhyU...55..633B Citation: Balega Yu Yu, Boyarchuk A A, Braginsky V B, Varshalovich D A, Dagkesamansky R D, Keldysh L V, Mesyats G A, Novikov I D, Pariisky Yu N, Stepanov A V, Cherepashchuk A M, Shustov B M "Nikolai Semenovich Kardashev (on his 80th birthday)" Phys. Usp.55 633–634 (2012)