参考资料

Sergei Adamovich Kovalyov (also spelled Sergey Kovalev; Russian: Сергей Адамович Ковалёв; 2 March 1930 - 9 August 2021) was a Russian human rights activist and politician. During the Soviet period he was a dissident and, after 1975, a political prisoner.

Sergei Kovalev, a renowned human rights advocate and dissident who had campaigned against the Kremlin since Soviet times, died in Russia on Monday at age 91, his son Ivan said on Facebook

It's December 2011, and Sergey Kovalev is sitting on the side of his bed, his lean, 6-foot, 175-pound frame folded over, his palms pressed to his temples. Sleep eludes him. Has for weeks. On Dec