PACS:01.60.+q, 01.55.+b (all) DOI:10.1070/PU1973v015n06ABEH005113 URL: https://ufn.ru/en/articles/1973/6/ae/ Citation: Lubchenko A F, Ovcharenko V I, Filippov G F "Aleksandr Sergeevich Davidov (on his sixtieth birthday)" Sov. Phys. Usp.15 861–862 (1973)