Biography of Sergey Aksakov written by Viktor Ostrogorskiy
<a href="https://ru.wikipedia.org/wiki/%D0%9E%D1%81%D1%82%D1%80%D0%BE%D0%B3%D0%BE%D1%80%D1%81%D0%BA%D0%B8%D0%B9,_%D0%92%D0%B8%D0%BA%D1%82%D0%BE%D1%80_%D0%9F%D0%B5%D1%82%D1%80%D0%BE%D0%B2%D0%B8%D1%87" class="extiw" title="ru:Острогорский, Виктор Петрович">Виктор Петрович Острогорский</a>
Unknown source<span style="display: none;">Unknown source</span>