https://www.worlddancesport.org/Athletes/Sergey-Tkachenko-474c49dd-20a7-4326-a711-9e1401359e19
Details of WDSF athlete Sergey Tkachenko
Details of the WDSF athlete Sergey Tkachenko. Also includes the partner and competition history
sergey tkachenkodetailswdsfathlete
https://eg.org.ua/tkachenkosn/
Sergey Tkachenko Nikolaevich - Chess Studies Database
sergey tkachenkochess studiesnikolaevichdatabase