User talk:2A04:4540:6A1E:6700:13E:50DE:8C23:4CC7

this reference is not correct..., the error on page Konstantin Nikolaev, reference [13] is marked in RED: Check |archive-url= value (help): [13] "Левитин, Игорь Евгеньевич" [Levitin, Igor Yevgenyevich]. kremlin.ru (in Russian). Retrieved October 27, 2018. Check |archive-url= value (help)