Potop, V.A., Rafal Grad, O.A. Omelyanchik, Marta Begajlo, and V.N. Boloban. 2014. “Element Nodes of Sports Equipment Double Back Flip Factions and Double Back Flip Hunched Performed Gymnast in Floor Exercise”. Pedagogics, Psychology, Medical-Biological Problems of Physical Training and Sports 18 (7):23-30. https://doi.org/10.6084/m9.figshare.1015381.