PACS:01.60.+q DOI:10.1070/PU1978v021n09ABEH005684 URL: https://ufn.ru/en/articles/1978/9/g/ Citation: Boyarchuk A A, Mel’nikov O A, Mirzoyan L V, Mustel’ E R, Sobolev V V, Kharadze E K "Viktor Amazaspovich Ambartsumyan (on his seventieth birthday)" Sov. Phys. Usp.21 801–803 (1978)