Переписка Николая I с цесаревичем Александром, будущим Александром II https://ru.wikisource.org/wiki/%D0%9F%D0%B5%D1%80%D0%B5%D0%BF%D0%B8%D1%81%D0%BA%D0%B0_%D1%86%D0%B5%D1%81%D0%B0%D1%80%D0%B5%D0%B2%D0%B8%D1%87%D0%B0_%D0%90%D0%BB%D0%B5%D0%BA%D1%81%D0%B0%D0%BD%D0%B4%D1%80%D0%B0_%D0%9D%D0%B8%D0%BA%D0%BE%D0%BB%D0%B0%D0%B5%D0%B2%D0%B8%D1%87%D0%B0_%D1%81_%D0%B8%D0%BC%D0%BF%D0%B5%D1%80%D0%B0%D1%82%D0%BE%D1%80%D0%BE%D0%BC_%D0%9D%D0%B8%D0%BA%D0%BE%D0%BB%D0%B0%D0%B5%D0%BC_I_(%D0%9D%D0%B8%D0%BA%D0%BE%D0%BB%D0%B0%D0%B9)